ラベル ハイエク の投稿を表示しています。 すべての投稿を表示
ラベル ハイエク の投稿を表示しています。 すべての投稿を表示

2013年8月31日土曜日

ハイエクの暗黙知理解について : コメントに対する返信

この記事は、私の過去の記事「設計主義のなにが問題なのか? ハイエクの知識論」に対して、匿名の方から寄せられたコメントに対する返事です。文章量が多くなってしまったので、別箇の記事として投稿することにしました。

匿名様のコメントは以下の通り:
 (2) その知識の大部分は「暗黙知」(tacit knowledge)であり、言語化・分節化できない。

 のところですが、この暗黙知解釈は、野中郁二郎さんの解釈ですが、間違っていますよ。ハイエク自身は、ポラニーについて、また、暗黙知については言及していないでしょ。ハイエクに添って、解説してほしいです。
  野中解釈は、暗黙知と明示知で、暗黙知なるものを実体化していますが、ポラニーが言ったのは、知るということ(知識が身につく)のプロセスにおいて、暗黙 の次元がある、ということです。暗黙知は、tacit knowingですから、knowingは動名詞です。暗黙の(語れない、分からない)作動なしに、知るということはない、といったのです。
 それから、
(3) 価格情報は、これら分散的・暗黙的な知識を集約的に表現する「指標」である。価格情報は知識の集約の結果であると同時に、新たな知識を形成する原因でもある。

 が省略されていますが、既存の経済学との対峙という意味では、これが重要ですね。できれば、説明していただきたいです。
以下、これに対する私の返信です。



コメントありがとうございます。仰る通り、この記事の内容は杜撰です。私が二年前に書いたものですが、今だったらこんな風に書きません。

まず、ハイエクの暗黙知理解について。私は、野中郁二郎氏を存じ上げませんが、どこかで見聞した通俗的な解釈を(それこそ暗黙的に)流用してしまったものと思われます。仰る通り、ハイエクに関してはこの記事の説明は的外れです。しかし、ハイエクがポランニーや暗黙知に言及していない、というのも誤解です。例えば論文「ルール、知覚、理解可能性」の中でポランニーの暗黙知理論が引かれています(Studies in Philosophy, Politics and Economics p.44)。

ただ、ハイエクの暗黙知理解とポランニーの暗黙知理解は大きく異なります。ポランニーにとっては、(その主著のタイトル『個人的知識』が示しているように)暗黙知はあくまで「個人」のものです。なお、少々脱線しますがポランニーにとって暗黙知は実体ではなく動名詞であるという貴方の指摘に関して、一点注意を促したいと思います。確かにポランニーは専らtacit knowingという言い方をしますが、彼はThe Tacit Dimensionの冒頭で次のように断っています:"I shall always speak of 'knowing,' therefore, to cover both practical and theoretical knowledge" (p.7)。つまり実践的と理論的双方の「知識」を包括的に指す言葉としてknowingを使用する、ということです。ポランニーの主眼が、知る行為の結果である知識よりも知る行為そのものに置かれていることは間違いないですが、必ずしも前者を排除しているわけではないでしょう。こうした、暗黙知の実体化を排除する見方はおそらく松岡正剛氏の解釈から来ているのだと推測しますが、この見方はポランニーの真意に沿うものではないと思います。松岡氏はパン生地をこねる職人の技能は暗黙知ではないと言い切っていますが、ポランニーははっきりと診断医(The Tacit Dimension pp.6-7)やピアニスト(同 p.18)の技能を暗黙知の例として挙げています。

では、ハイエクの場合はどうでしょう。ハイエクにとって暗黙的なのは知覚や行為を統御する「ルール」です。ここで重要なのは、(明示的)「知識」を保持しているのは個人であるが、「ルール」を保持しているのは個人ではない、という点です。ハイエクにとって知覚ルールや行為ルールは、複雑な環境に対して適切に振る舞う必要性から、長い年月をかけて進化してきたものです。こうしたルールは、進化の遅い段階で一部が成文法といった形で明文化されることはあっても、その本質においては暗黙的なもので、人間はこうしたルールに従うことによって、彼が(明示的に)知っている以上のことを知ることができる、とハイエクは述べています。言い換えれば、一人ひとりの人間は自分の周囲の限られた領域の事柄以外に関しては無知であるにも関わらず、こうした暗黙的なルールに従うことによって、彼は知らず知らずのうちに、彼の認識可能な範囲を超えた遠い場所や遠い過去の事柄に関する知識を有効に活用することができる、というわけです。これが可能なのは、(繰り返しになりますが)こうした認識可能な範囲を超えた知識の存在形態が「ルール」に他ならないからです。ハイエクのこうしたルール概念については、「ルール、知覚、理解可能性」(Studies in Philosophy, Politics and Economics pp.43-65)、「行為ルール・システムの進化に関するノート」(同 pp.66-81)、および「抽象的なるものの先行性」(New Studies in Philosophy, Politics, Economics and the History of Ideas pp.35-49)が参考になります。

したがって、ハイエクにとって、「暗黙知を明示化できない」という前提から直接「集産主義は不可能」という結論が導かれるわけではありません(だからこそ私が件の記事に載せた説明は的外れなんです)。ハイエクの議論を正しく図式化すれば、「文明の複雑化に伴って人間が暗黙的なルールに頼る度合いが増加する」→「一人ひとりの人間の認識可能な範囲がますます狭くなる」→「こうした大きな社会においては、分散した知識を一箇所に集めることができない(集産主義が不可能)」という風になると思われます。つまり、集産主義に対するハイエクの批判の要点は、明示化できない知識をむりやり明示化しようとしている、といったことではなく、あくまで知識の分散です。『自由の条件』の第二章がこの議論を分かりやすく表していると思うので、二節だけ引いておきます(原文ですみません、手元に翻訳はないのです):
While the growth of our knowledge of nature constantly discloses new realms of ignorance, the increasing complexity of the civilization which this knowledge enables us to build presents new obstacles to the intellectual comprehension of the world around us. The more men know, the smaller the share of all that knowledge becomes that any one mind can absorb. The more civilized we become, the more relatively ignorant must each individual be of the facts on which the working of his civilization depends. The very division of knowledge increases the necessary ignorance of the individual of most of this knowledge. (The Constitution of Liberty: The Definitive Edition p.78)

We have now reached the point at which the main contention of this chapter will be readily intelligible. It is that the case for individual freedom rests chiefly on the recognition of the inevitable ignorance of all of us concerning a great many of the factors on which the achievement of our ends and welfare depends. (The Constitution of Liberty: The Definitive Edition p.80) 
また、"The Epistemological Argument Against Socialism: A Wittgensteinian Critique of Hayek and Giddens"という研究の中で、Nigel Pleasantsがまさにこの点においてハイエクを誤解している(ハイエクの暗黙知概念をルールではなく個人が保有するものと考えている)ために、かえって非常に参考になります。私自身、この論文を読んで自分の解釈の誤りに気付かされました。お勧めしておきます。

最後に、第三のテーゼ「価格情報は、これら分散的・暗黙的な知識を集約的に表現する『指標』である。価格情報は知識の集約の結果であると同時に、新たな知識を形成する原因でもある」について。これも大分杜撰な書き方をしてしまいました。私は経済学の知識に乏しいので、残念ながら大して有意義なことは述べられないです。これを書いたとき私の念頭にあったのは、塩沢由典氏の「ミクロ・マクロ・ループ」という概念だったと思います。つまり、経済現象のミクロなレベルにおける振る舞い(行為主体の経済活動)と、マクロなレベルにおける振る舞い(様々な慣習的・制度的構造の出現)は因果的にループしている、という考えです。価格システムも大局的なレベルにおける制度構造の一つということで、「価格情報は知識の集約の結果であると同時に、新たな知識を形成する原因でもある」という風に書いたんだと思います。このミクロ・マクロ・ループの考えが、新古典派経済学の方法論的個人主義(ただしオーストリア学派の方法論的個人主義とは異なる、狭い意味でのそれ)に対する批判の基礎になります。しかし、これはかなり大雑把な物言いです。私の見解に耳を傾けるより、塩沢由典『複雑さの帰結』(ミクロ・マクロ・ループが出てくるのは確か第三章だったと思います)を読まれた方が遥かに有益と思われます。

2012年10月6日土曜日

【メモ】 F. A. Hayek, The Constitution of Liberty

ページ番号はDefinitive Edition (2011)のもの。



【序論】

We must show that liberty is not merely one particular value but that it is the source and condition of most moral values. (p.52)

【第二章 自由文明の創造力】

We know little of the particular facts to which the whole of social activity continuously adjusts itself in order to provide what we have learned to expect. We know even less of the forces which bring about this adjustment by appropriately co-ordinating individual activity. And our attitude, when we discover how little we know of what makes us- co-operate, is, on the whole, one of resentment rather than of wonder or curiosity. Much of our occasional impetuous desire to smash the whole entangling machinery of civilization is due to this inability of man to understand what he is doing. (p.76)

The successful combination of knowledge and aptitude is not selected by common deliberation, by people seeking a solution to their problems through a joint effort; it is the product of individuals imitating those who have been more successful and from their being guided by signs or symbols, such as prices offered for their products or expressions of moral or aesthetic esteem for their having observed standards of conduct - in short, of their using the results of the experiences of others. (pp.79-80)

We have now reached the point at which the main contention of this chapter will be readily intelligible. It is that the case for individual freedom rests chiefly on the recognition of the inevitable ignorance of all of us concerning a great many of the factors on which the achievement of our ends and welfare depends. If there were omniscient men, if we could know not only all that affects the attainment of our present wishes but also our future wants and desires, there would be little case for liberty. And, in turn, liberty of the individual would, of course, make complete foresight impossible. Liberty is essential in order to leave room for the unforeseeable and unpredictable; we want it because we have learned to expect from it the opportunity of realizing many of our aims. It is because every individual knows so little and, in particular, because we rarely know which of us knows best that we trust the independent and competitive efforts of many to induce the emergence of what we shall want when we see it. (p.80)

All we can do is to increase the chance that some special constellation of individual endowment and circumstance will result in the shaping of some new tool or the improvement of an old one, and to improve the prospect that such innovations will become rapidly known to those who can take advantage of them. (p.81)

Certainty we cannot achieve in human affairs, and it is for this reason that, to make the best use of what knowledge we have, we must adhere to rules which experience has shown to serve best on the whole, though we do not know what will be the consequences of obeying them in the particular instance. (p.82)

It is not because we like to be able to do particular things, not because we regard any particular freedom as essential to our happiness, that we have a claim to freedom. The instinct that makes us revolt against any physical restraint, though a helpful ally, is not always a safe guide for justifying or delimiting freedom. What is important is not what freedom I personally would like to exercise but what freedom some person may need in order to do things beneficial to society. This freedom we can assure to the unknown person only by giving it to all. (p.84)

Because we are more aware that our advances in the intellectual sphere often spring from the unforeseen and undesigned, we tend to overstress the importance of freedom in this field and to ignore the importance of the freedom of doing things. But the freedom of research and belief and the freedom of speech and discussion, the importance of which is widely understood, are significant only in the last stage of the process in which new truths are discovered. To extol the value of intellectual liberty at the expense of the value of the liberty of doing things would be like treating the crowning part of an edifice as the whole. (p.85)

It has become a common practice to disparage freedom of action by calling it "economic liberty." But the concept of freedom of action is much wider than that of economic liberty, which it includes; and, what is more important, it is very questionable whether there are any actions which can be called merely "economic" and whether any restrictions on liberty can be confined to what are called merely "economic" aspects. Economic considerations are merely those by which we reconcile and adjust our different purposes, none of which, in the last resort, are economic (excepting those of the miser or the man for whom making money has become an end in itself). (p.87)

All that we can know is that the ultimate decision about what is good or bad will be made not by individual human wisdom but by the decline of the groups that have adhered to the "wrong" beliefs. (p.88)

【第三章 進歩のコモン・センス】

After abandoning hunting life, most of our direct ancestors, at the beginning of neolithic culture, took to agriculture and soon to urban life perhaps less than three thousand years or one hundred generations ago. It is not surprising that in some respects man's biological equipment has not kept pace with that rapid change, that the adaptation of his non-rational part has lagged somewhat, and that many of his instincts and emotions are still more adapted to the life of a hunter than to life in civilization. If many features of our civilization seem to us unnatural, artificial, or unhealthy, this must have been man's experience ever since he first took to town life, which is virtually since civilization began. All the familiar complaints against industrialism, capitalism, or overrefinement are largely protests against a new way of life that man took up a short while ago after more than half a million years' existence as a wandering hunter, and that created problems still unsolved by him. (pp.92-93)

If it were still possible to change an established usage, it would be desirable to confine the word "progress" to such deliberate advance toward a chosen goal and to speak only of the "evolution of civilization." (p.94 n4)

Even the poorest today owe their relative material well-being to the results of past inequality. (p.98)

【第四章 自由・理性・伝統】

We must always work inside a framework of both values and institutions which is not of our own making. In particular, we can never synthetically construct a new body of moral rules or make our obedience of the known rules dependent on our comprehension of the implications of this obedience in a given instance. (pp.124-125)

That we ought not to believe anything which has been shown to be false does not mean that we ought to believe only what has been demonstrated to be true. (p.125)

For in each particular instance it will be possible to promise concrete and tangible advantages as the result of a curtailment of freedom, while the benefits sacrificed will in their nature always be unknown and uncertain. If freedom were not treated as the supreme principle, the fact that the promises which a free society has to offer can always be only chances and not certainties, only opportunities and not definite gifts to particular individuals, would inevitably prove a fatal weakness and lead to its slow erosion. (p.130)

Reason undoubtedly is man's most precious possession. Our argument is intended to show merely that it is not all-powerful and that the belief that it can become its own master and control its own development may yet destroy it. What we have attempted is a defense of reason against its abuse by those who do not understand the conditions of its effective functioning and continuous growth. It is an appeal to men to see that we must use our reason intelligently and that, in order to do so, we must preserve that indispensable matrix of the uncontrolled and non-rational which is the only environment wherein reason can grow and operate effectively. (pp.130-131)

【第五章 責任と自由】

Though it [a free society] can offer to the individual only chances and though the outcome of his efforts will depend on innumerable accidents, it forcefully directs his attention to those circumstances that he can control as if they were the only ones that mattered. Since the individual is to be given the opportunity to make use of circumstances that may be known only to him and since, as a rule, nobody else can know whether he has made the best use of them or not, the presumption is that the outcome of his actions is determined by them, unless the contrary is quite obvious. (p.133)

We still call a man's decision "free," though by the conditions we have created he is led to do what we want him to do, because these conditions do not uniquely determine his actions but merely make it more likely that anyone in his position will do what we approve. We try to "influence" but do not determine what he will do. What we often mean in this connection, as in many others, when we call his action "free," is simply that we do not know what has determined it, and not that it has not been determined by something. (p.138 n8)

Of the effect in the particular instance we may never be sure, but we believe that, in general, the knowledge that he [a man] will be held responsible will influence a person's conduct in a desirable direction. In this sense the assigning of responsibility does not involve the assertion of a fact. It is rather of the nature of a convention intended to make people observe certain rules. (p.138)

Though we leave people to decide for .themselves because they are, as a rule, in the best position to know the circumstances surrounding their action, we are also concerned that conditions should permit them to use their knowledge to the best effect. If we allow men freedom because we presume them to be reasonable beings, we also must make it worth their while to act as reasonable beings by letting them bear the consequences of their decisions. (p.139)

The assigning of responsibility thus presupposes the capacity on men's part for rational action, and it aims at making them act more rationally than they would otherwise. It presupposes a certain minimum capacity in them for learning and foresight, for being guided by a knowledge of the consequences of their action. It is no objection to argue that reason in fact plays only a small part in determining human action, since the aim is to make that little go as far as possible. Rationality, in this connection, can mean no more than some degree of coherence and consistency in a person's action, some lasting influence of knowledge or insight which, once acquired, will affect his action at a later date and in different circumstances. (p.139)

The assigning of responsibility is based, not on what we know to be true in the particular case, but on what we believe will be the probable effects of encouraging people to behave rationally and considerately. It is a device that society has developed to cope with our inability to look into other people's minds and, without resorting to coercion, to introduce order into our lives. (p.140)

As everybody's property in effect is nobody's property, so everybody's responsibility is nobody's responsibility. (p.146)

Much as we may regret the disappearance of those close communities of interest and their replacement by a wide-flung net of limited, impersonal, and temporary ties, we cannot expect the sense of responsibility for the known and familiar to be replaced by a similar feeling about the remote and the theoretically known. While we can feel genuine concern for the fate of our familiar neighbors and usually will know how to help when help is needed, we cannot feel in the same way about the thousands or millions of unfortunates whom we know to exist in the world but whose individual circumstances we do not know. However moved we may be by accounts of their misery, we cannot make the abstract knowledge of the numbers of suffering people guide our everyday action. If what we do is to be useful and effective, our objectives must be limited, adapted to the capacities of our mind and our compassions. To be constantly reminded of our "social" responsibilities to all the needy or unfortunate in our community, in our country, or in the world, must have the effect of attenuating our feelings until the distinctions between those responsibilities which call for our action and those which do not disappear. In order to be effective, then, responsibility must be so confined as to enable the individual to rely on his own concrete knowledge in deciding on the importance of the different tasks, to apply his moral principles to circumstances he knows, and to help to mitigate evils voluntarily. (p.147)

【第六章 平等・価値・メリット】

Wherever there is a legitimate need for government action and we have to choose between different methods of satisfying such a need, those that incidentally also reduce inequality may well be preferable. If, for example, in the law of intestate succession one kind of provision will be more conducive to equality than another, this may be a strong argument in its favor. It is a different matter, however, if it is demanded that, in order to produce substantive equality, we should abandon the basic postulate of a free society, namely, the limitation of all coercion by equal law. Against this we shall hold that economic inequality is not one of the evils which justify our resorting to discriminatory coercion or privilege as a remedy. (p.151)

When we inquire into the justification of these demands, we find that they rest on the discontent that the success of some people often produces in those that are less successful, or, to put it bluntly, on envy. The modern tendency to gratify this passion and to disguise it in the respectable garment of social justice is developing into a serious threat to freedom. Recently an attempt was made to base these demands on the argument that it ought to be the aim of politics to remove all sources of discontent. This would, of course, necessarily mean that it is the responsibility of government to see that nobody is healthier or possesses a happier temperament, a better-suited spouse or more prospering children, than anybody else. If really all unfulfilled desires have a claim on the community, individual responsibility is at an end. However human, envy is certainly not one of the sources of discontent that a free society can eliminate. It is probably one of the essential conditions for the preservation of such a society that we do not countenance envy, not sanction its demands by camouflaging it as social justice, but treat it, in the words of John Stuart Mill, as "the most anti-social and evil of all passions." (pp.155-156)

If the remuneration did not correspond to the value that the product of a man's efforts has for his fellows, he would have no basis for deciding whether the pursuit of a given object is worth the effort and risk. He would necessarily have to be told what to do, and some other person's estimate of what was the best use of his capacities would have to determine both his duties and his remuneration. (pp.159-160)

The prizes that a free society offers for the result serve to tell those who strive for them how much effort they are worth. However, the same prizes will go to all those who produce the same result, regardless of effort. (p.160)

【第七章 多数決】

Liberalism is a doctrine about what the law ought to be, democracy a doctrine about the manner of determining what will be the law. Liberalism regards it as desirable that only what the majority accepts should in fact be law, but it does not believe that this is therefore necessarily good law. Its aim, indeed, is to persuade the majority to observe certain principles. It accepts majority rule as a method of deciding, but not as an authority for what the decision ought to be. To the doctrinaire democrat the fact that the majority wants something is sufficient ground for regarding it as good; for him the will of the majority determines not only what is law but what is good law. (p.167)

There are three chief arguments by which democracy can be justified, each of which may be regarded as conclusive. The first is that, whenever it is necessary that one of several conflicting opinions should prevail and when one would have to be made to prevail by force if need be, it is less wasteful to determine which has the stronger support by counting numbers than by fighting. Democracy is the only method of peaceful change that man has yet discovered. The second argument, which historically has been the most important and which is still very important, though we can no longer be sure that it is always valid, is that democracy is an important safeguard of individual liberty. ... The third argument rests on the effect which the existence of democratic institutions will have on the general level of understanding of public affairs. This seems to me the most powerful. (pp.172-174)

There is some truth in the view that democracy is government by discussion, but this refers only to the last stage of the process by which the merits of alternative views and desires are tested. Though discussion is essential, it is not the main process by which people learn. Their views and desires are formed by individuals acting according to their own designs; and they profit from what others have learned in their individual experience. Unless some people know more than the rest and are in a better position to convince the rest, there would be little progress in opinion. It is because we normally do not know who knows best that we leave the decision to a process which we do not control. But it is always from a minority acting in ways different from what the majority would prescribe that the majority in the end learns to do better. (p.176)

They [the resolutions of a majority] are bound, if anything, to be inferior to the decisions that the most intelligent members of the group will make after listening to all opinions: they will be the result of less careful thought and will generally represent a compromise that will not fully satisfy anybody. This will be even more true of the cumulative result emanating from the successive decisions of shifting majorities variously composed: the result will be the expression not of a coherent conception but of different and often conflicting motives and aims. (p.176)

Moreover, majority decisions are peculiarly liable, if not guided by accepted common principles, to produce over-all results that nobody wanted. It often happens that a majority is forced by its own decisions to further actions that were neither contemplated nor desired. (p.177)

"The lesson given to mankind by every age, and always disregarded - that speculative philosophy, which to the superficial appears a thing so remote from the business of life and the outward interest of men, is in reality the thing on earth which most influences them, and in the long run overbears any influences save those it must itself obey." (John Stuart Mill, "Bentham" in Collected Works, vol. 10, p.77)

If politics is the art of the possible, political philosophy is the art of making politically possible the seemingly impossible. (pp.180-181)

Only a complete misapprehension of the process by which opinion progresses would lead one to argue that in the sphere of opinion he ought to submit to majority views. To treat existing majority opinion as the standard for what majority opinion ought to be would make the whole process circular and stationary. There is, in fact, never so much reason for the political philosopher to suspect himself of failing in his task as when he finds that his opinions are very popular. (p.181)

"Students of social science must fear popular approval: evil is with them when all men speak well of them. If there is any set of opinions by the advocacy of which a newspaper can increase its sale, then the student, who wishes to leave the world in general and his country in particular better than it would be if he had not been born, is bound to dwell on the limitations and defects and errors, if any, in that set of opinions: and never to advocate them unconditionally even in an ad hoc discussion. It is almost impossible for a student to be a true patriot and to have the reputation of being one in his own time." (Alfred Marshall, "In Memoriam: Alfred Marshall" in Memorials of Alfred Marshall p.89)

The old liberal is in fact a much better friend of democracy than the dogmatic democrat, for he is concerned with preserving the conditions that make democracy workable. It is not "antidemocratic" to try to persuade the majority that there are limits beyond which its action ceases to be beneficial and that it should observe principles which are not of its own deliberate making. If it is to survive, democracy must recognize that it is not the fountainhead of justice and that it needs to acknowledge a conception of justice which does not necessarily manifest itself in the popular view on every particular issue. The danger is that we mistake a means of securing justice for justice itself. (p.183)

【第八章 雇用と独立】

The selection through inheritance from parents (...) has at least the advantage (even if we do not take into account the probability of inherited ability) that those who are given the special opportunity will usually have been educated for it and will have grown up in an environment in which the material benefits of wealth have become familiar and, because they are taken for granted, have ceased to be the main source of satisfaction. The grosser pleasures in which the newly rich often indulge have usually no attraction for those who have inherited wealth. If there is any validity in the contention that the process of social ascent should sometimes extend through several generations, and if we admit that some people should not have to devote most of their energies to earning a living but should have the time and means to devote themselves to whatever purpose they choose, then we cannot deny that inheritance is probably the best means of selection known to us. (p.192)

It is only natural that the development of the art of living and of the non-materialistic values should have profited most from the activities of those who had no material worries. (p.196)

【第九章 強制と国家】

Coercion thus is bad because it prevents a person from using his mental powers to the full and consequently from making the greatest contribution that he is capable of to the community. Though the coerced will still do the best he can do for himself at any given moment, the only comprehensive design that his actions fit into is that of another mind. (pp.200-201)

Even if the threat of starvation to me and perhaps to my family impels me to accept a distasteful job at a very low wage, even if I am "at the mercy" of the only man willing to employ me, I am not coerced by him or anybody else. So long as the act that has placed me in my predicament is not aimed at making me do or not do specific things, so long as the intent of the act that harms me is not to make me serve another person's ends, its effect on my freedom is not different from that of any natural calamity - a fire or a flood that destroys my house or an accident that harms my health. (p.204)

Provided that I know beforehand that if I place myself in a particular position, I shall be coerced and provided that I can avoid putting myself in such a position, I need never be coerced. At least insofar as the rules providing for coercion are not aimed at me personally but are so framed as to apply equally to all people in similar circumstances, they are no different from any of the natural obstacles that affect my plans. In that they tell me what will happen if I do this or that, the laws of the state have the same significance for me as the laws of nature; and I can use my knowledge of the laws of the state to achieve my own aims as I use my knowledge of the laws of nature. (p.210)

In particular, the pleasure or pain that may be caused by the knowledge of other people's actions should never be regarded as a legitimate cause for coercion. The enforcement of religious conformity, for instance, was a legitimate object of government when people believed in the collective responsibility of the community toward some deity and it was thought that the sins of any member would be visited upon all. But where private practices cannot affect anybody but the voluntary adult actors, the mere dislike of what is being done by others, or even the knowledge that others harm themselves by what they do, provides no legitimate ground for coercion. (p.212)

Generally speaking, this means that the morality of action within the private sphere is not a proper object for coercive control by the state. Perhaps one of the most important characteristics that distinguish a free from an unfree society is indeed that, in matters of conduct that do not directly affect the protected sphere of others, the rules which are in fact observed by most are of a voluntary character and not enforced by coercion. Recent experience with totalitarian regimes has emphasized the importance of the principle "never [to] identi fy the cause of moral values with that of the State." It is indeed probable that more harm and misery have been caused by men determined to use coercion to stamp out a moral evil than by men intent on doing evil. (p.213)

【第十章 法・命令・秩序】

"The law serves morality, not in that it fulfills her commands, but rather in that it secures the free development of the moral power as it resides in each individual will. The existence of law, however, is independent of that of morality inasmuch as it is not a contradiction when, in any specific case, the immoral implementations of an existing law is claimed." (Friedrich Carl von Savigny, System des heutigen römischen Rechts, vol.1, pp.331-332)

Though he [the African Bantu who is required to follow the rigorously prescribed lines when he moves between the fourteen huts of his village, depending on his age, sex, and status] is not obeying another man's will but impersonal custom, having to observe a ritual to reach a certain point restricts his choice of method more than is necessary to secure equal freedom to others. (pp.219-220)

The "compulsion of custom" becomes an obstacle only when the customary way of doing things is no longer the only way that the individual knows and when he can think of other ways of achieving a desirable object. It was largely with the growth of individual intelligence and the tendency to break away from the habitual manner of action that it became necessary to state explicitly or reformulate the rules and gradually to reduce the positive prescriptions to the essentially negative confinement to a range of actions that will not interfere with the similarly recognized spheres of others. (p.220)

In most instances, therefore, nobody knows or has ever known all the reasons and considerations that have led to a rule being given a particular form. We must thus often endeavor to discover the functions that a rule actually serves. If we do not know the rationale of a particular rule, as is often the case, we must try to understand what its general function or purpose is to be if we are to improve upon it by deliberate legislation. (pp.225-226)

It is true enough that the justification of any particular rule of law must be its usefulness - even though this usefulness may not be demonstrable by rational argument but known only because the rule has in practice proved itself more convenient than any other. But, generally speaking, only the rule as a whole must be so justified, not its every application. The idea that each conflict, in law or in morals, should be so decided as would seem most expedient to somebody who could comprehend all the consequences of that decision involves the denial of the necessity of any rules. (p.228)

【第十二章 アメリカの貢献 : 立憲制】

Because of the restricted capacity of our minds, our immediate purposes will always loom large, and we will tend to sacrifice long-term advantages to them. In individual as in social conduct we can therefore approach a measure of rationality or consistency in making particular decisions only by submitting to general principles, irrespective of momentary needs. Legislation can no more dispense with guidance by principles than any other human activity if it is to take account of effects in the aggregate. (pp.266-267)

Like the forces governing the individual mind, the forces making for social order are a multilevel affair; and even constitutions are based on, or presuppose, an underlying agreement on more fundamental principles - principles which may never have been explicitly expressed, yet which make possible and precede the consent and the written fundamental laws. We must not believe that, because we have learned to make laws deliberately, all laws must be deliberately made by some human agency. Rather, a group of men can form a society capable of making laws because
they already share common beliefs which make discussion and persuasion possible and to which the articulated rules must conform in order to be accepted as legitimate. (pp.268-269)


It is inevitable that, by accepting general principles, they [the people] will tie their hands as far as particular issues are concerned. For only by refraining from measures which they would not wish to be used on themselves can the members of a majority forestall the adoption of such measures when they are in a minority. A commitment to long-term principles, in fact, gives the people more control over the general nature of the political order than they would possess if its character were to be determined solely by successive decisions of particular issues. (p.269)

【第十三章 自由と行政府 : 法治国家】

The extent to which under an established system of case law the judge actually creates law may not be greater than under a system of codified law. But the explicit recognition that jurisdiction as well as legislation is the source of law, though in accord with the evolutionary theory underlying the British tradition, tends to obscure the distinction between the creation and the application of law. And it is a question whether the much praised flexibility of the common law, which has been favorable to the evolution of the rule of law so long as that was the accepted political ideal, may not also mean less resistance to the tendencies undermining it, once that vigilance which is needed to keep liberty alive disappears. (p.298)

【第十四章 個人的自由の保護】 

The rule of law is therefore not a rule of the law, but a rule concerning what the law ought to be, a meta-legal doctrine or a political ideal. It will be effective only in so far as the legislator feels bound by it. In a democracy this means that it will not prevail unless it forms part of the moral tradition of the community, a common ideal shared and unquestioningly accepted by the majority. (p.311)

【第十五章 経済政策と法の支配】

We shall see that the observation of the rule of law is a necessary, but not yet a sufficient, condition for the satisfactory working of a free economy. But the important point is that all coercive action of government must be unambiguously determined by a permanent legal framework which enables the individual to plan with a degree of confidence and which reduces human uncertainty as much as possible. (pp.331-332)

A free system can adapt itself to almost any set of data, almost any general prohibition or regulation, so long as the adjusting mechanism itself is kept functioning. And it is mainly changes in prices that bring about the necessary adjustments. This means that, for it to function properly, it is not sufficient that the rules of law under which it operates be general rules, but their content must be such that the market will work tolerably well. The case for a free system is not that any system will work satisfactorily where coercion is confined by general rules, but that under it such rules can be given a form that will enable it to work. If there is to be an efficient adjustment of the different activities in the market, certain minimum requirements must be met; the more important of these are, as we have seen, the prevention of violence and fraud, the protection of property and the enforcement of contracts, and the recognition of equal rights of all individuals to produce in whatever quantities and sell at whatever prices they choose. Even when these basic conditions have been satisfied, the efficiency of the system will still depend on the particular content of the rules. But if they are not satisfied, government will have to achieve by direct orders what individual decisions guided by price movements will. (pp.337-338) 

How well the market will function depends on the character of the particular rules. The decision to rely on voluntary contracts as the main instrument for organizing the relations between individuals does not determine what the specific content of the law of contract ought to be; and the recognition of the right of private property does not determine what exactly should be the content of this right in order that the market mechanism will work as effectively and beneficially as possible. Though the principle of private property raises comparatively few problems so far as movable things are concerned, it does raise exceedingly difficult ones where property in land is concerned. The effect which the use of any one piece of land often has on neighboring land clearly makes it undesirable to give the owner unlimited power to use or abuse his property as he likes. (p.338)

【第十七章 社会主義の衰退と福祉国家の台頭】

It is often those who are most anxious to use our existing knowledge and powers to the full that do most to impair the future growth of knowledge by the methods they use. The controlled single-channel development toward which impatience and administrative convenience have frequently inclined the reformer and which, especially in the field of social insurance, has become characteristic of the modern welfare state may well become the chief obstacle to future improvement. (p.377)


Satisfactory solutions to these problems [problems which arise from international relations] will probably not be found as long as we have to accept as the ultimate units of international order the historically given entities known as sovereign nations. (p.379)

[U]ntil the protection of individual freedom is much more firmly secured than it is now, the creation of a world state probably would be a greater danger to the future of civilization than even war. (p.380)

I have become increasingly skeptical, however, about the beneficial character of any discretionary action of government against particular monopolies, and I am seriously alarmed at the arbitrary nature of all policy aimed at limiting the size of individual enterprises. And when policy creates a state of affairs in which, as is true of some enterprises in the United States, large firms are afraid to compete by lowering prices because this may expose them to antitrust action, it becomes an absurdity. (p.382)

It has been the experience of all countries that discretionary powers in the treatment of monopoly are soon used to distinguish between "good" and "bad" monopolies and that authority soon becomes more concerned with protecting the supposedly good than with preventing the bad. I doubt whether there arc any "good" monopolies that deserve protection. But there will always be inevitable monopolies whose transitory and temporary character is often turned into a permanent one by the solicitude of government. (p.383)

【第十八章 労働組合と雇用】

[W]orkers can raise real wages above the level that would prevail on a free market only by limiting the supply, that is, by withholding part of labor. The interest of those who will get employment at the higher wage will therefore always be opposed to the interest of those who, in consequence, will find employment only in the less highly paid jobs or who will not be employed at all. (p.389)

As a general rule, wage fixing (whether by unions or by authority) will make wages higher than they would otherwise be only if they are also higher than the wage at which all willing workers can be employed. (p.389)

[S]trictly voluntary unions, because their wage policy would not be in the interest of all workers, could not long receive the support of all. Unions that had no power to coerce outsiders would thus not be strong enough to force up wages above the level at which all seeking work could be employed, that is, the level that would establish itself in a truly free market for labor in general. (p.389)

It is important to note that such policies [of violence that some unions find expedient to use] can be employed successfully only in relatively prosperous and highly paid occupations and that they will therefore result in the exploitation of the relatively poor by the better-off. Even though within the scope of any one union its actions may tend to reduce differences in remuneration, there can be little doubt that, so far as relative wages in major industries and trades are concerned, unions today are largely responsible for an inequality which has no function and is entirely the result of privilege. (p.390)

It is, in fact, more than likely that, in countries where unions are very strong, the general level of real wages is lower than it would otherwise be ... If many still accept as an obvious and undeniable fact that the general wage level has risen as fast as it has done because of the efforts of the unions, they do so in spite of these unambiguous conclusions of theoretical analysis - and in spite of empirical evidence to the contrary. (p.390)
 
"The world we now live in is one in which the monetary system has become relatively elastic, so that it can accommodate itself to changes in wages, rather than the other way about. Instead of actual wages having to adjust themselves to an equilibrium level, monetary policy adjusts the equilibrium level of money wages so as to make it conform to the actual level. It is hardly an exaggeration to say that instead of being on a Gold Standard, we are on a Labour Standard." (John Hicks, "Economic Foundations of Wage Policy")

【第十九章 社会保障】

Though all insurance involves a pooling of risks, private competitive insurance can never effect a deliberate transfer of income from one previously designated group of people to another. (p.408)

It may seem harsh, but it is probably in the interest of all that under a free system those with full earning capacity should often be rapidly cured of a temporary and not dangerous disablement at the expense of some neglect of the aged and mortally ill. Where systems of state medicine operate, we generally find that those who could be promptly restored to full activity have to wait for long periods because all the hospital facilities are taken up by people who will never again contribute to the needs of the rest. (p.423)

【第二十章 課税と再分配】

This effect on incentive, in the usual sense of the term, though important and frequently stressed, is by no means the most harmful effect of progressive taxation. Even here the objection is not so much that people may, as a result, not work as hard as they otherwise would, as it is that the change in the net remunerations for different activities will often divert their energies to activities where they are less useful than they might be. The fact that with progressive taxation the net remuneration for any service will vary with the time rate at which the earning accrues thus becomes a source not only of injustice but also of a misdirection of resources. (p.444)

The most serious consequence, however, of the discouragement of individual capital formation where there are temporary opportunities for large profits is the restriction of competition. The system [progressive taxation] tends generally to favor corporate as against individual saving and particularly to strengthen the position of the established corporations against newcomers. It thus assists to create quasi-monopolistic situations. Because taxes today absorb the greater part of the newcomer's "excessive" profits, he cannot, as has been well said, "accumulate capital; he cannot expand his own business; he will never become big business and a match for the vested interests. The old firms do not need to fear his competition: they are sheltered by the tax collector. They may with impunity indulge in routine, they may defy the wishes of the public and become conservative. It is true, the income tax prevents them, too, from accumulating new capital. But what is more important for them is that it prevents the dangerous newcomer from accumulating any capital. They are virtually privileged by the tax system. In this sense progressive taxation checks economic progress and makes for rigidity." (p.447)

In the last resort, the problem of progressive taxation is, of course, an ethical problem, and in a democracy the real problem is whether the support that the principle now receives would continue if the people fully understood how it operates. It is probable that the practice is based on ideas which most people would not approve if they were stated abstractly. (p.449)

【第二十三章 農業と天然資源】

However strong a case there may exist in such countries [underdeveloped countries] for the government's taking the initiative in providing examples and spending freely on spreading knowledge and education, it seems to me that the case against over-all planning and direction of all economic activity is even stronger there than in more advanced countries. I say this on both economic and cultural grounds. Only free growth is likely to enable such countries to develop a viable civilization of their own, capable of making a distinct contribution to the needs of mankind. (p.491)

【第二十四章 教育と研究】

Though the specialized research institution may be the most efficient for all tasks that are of an "applied" character, such institutional research is always in some measure directed research, the aim of which is determined by the specialized equipment, the particular team assembled, and the concrete purpose to which the institution is dedicated. But in "fundamental" research on the outskirts of knowledge there are often no fixed subjects or fields, and the decisive advances will frequently be due to the disregard of the conventional division of disciplines. (p.511)

If in this book we have been concerned mainly with freedom in other fields [fields other than intellectual freedom], it is because we so often forget today that intellectual freedom rests on a much wider foundation of freedom and cannot exist without it. But the ultimate aim of freedom is the enlargement of those capacities in which man surpasses his ancestors and to which each generation must endeavor to add its share - its share in the growth of knowledge and the gradual advance of moral and aesthetic beliefs, where no superior must be allowed to enforce one set of views of what is righ t or good and where only further experience can decide what should prevail. (p.515)

【追論 なぜ私は保守主義者でないか】

Since it [conservatism] distrusts both abstract theories and general principles, it neither understands those spontaneous forces on which a policy of freedom relies nor possesses a basis for formulating principles of policy. ... A commitment to principles presupposes an understanding of the general forces by which the efforts of society are co-ordinated, but it is such a theory of society and especially of the economic mechanism that conservatism conspicuously lacks. (pp.522-523)

To live and work successfully with others requires more than faithfulness to one's concrete aims. It requires an intellectual commitment to a type of order in which, even on issues which to one are fundamental, others are allowed to pursue different ends. (p.524)

Personally, I find that the most objectionable feature of the conservative attitude is its propensity to reject well-substantiated new knowledge because it dislikes some of the consequences which seem to follow from it - or, to put it bluntly, its obscurantism. I will not deny that scientists as much as others are given to fads and fashions and that we have much reason to be cautious in accepting the conclusions that they draw from their latest theories. But the reasons for our reluctance must themselves be rational and must be kept separate from our regret that the new theories upset our cherished beliefs. I can have little-patience with those who oppose, for instance, the theory of evolution or what are called "mechanistic" explanations of the phenomena of life simply because of certain moral consequences which at first seem to follow from these theories, and still less with those who regard it as irreverent or impious to ask certain questions at all. By refusing to face the facts, the conservative only weakens his own position. Frequently the conclusions which rationalist presumption draws from new scientific insights do not at all follow from them. But only by actively taking part in the elaboration of the consequences of new discoveries do we learn whether or not they fit into our world picture and, if so, how. Should our moral beliefs really prove to be dependent on factual assumptions shown to be incorrect, it would be hardly moral to defend them by refusing to acknowledge facts. (p.526)

What distinguishes the liberal from the conservative here [concerning religious belief] is that, however profound his own spiritual beliefs, he will never regard himself as entitled to impose them on others and that for him the spiritual and the temporal are different spheres which ought not to be confused. (p.528)

2012年9月24日月曜日

【メモ】 Hayek in Mind: Hayek's Philosophical Psychology

<Leslie Marsh, ""Socializing" the Mind and "Cognitivizing" Sociality">

本書の導入論文。短いながらも素晴らしい。

Hayek is different things to different people, ranging from well-founded, though selective, characterizations to ill-founded and tiresome caricatures. Perhaps this is the fate of all genuine polymaths, easily amenable to being coopted in the service of some ideological stance or subject to the more subtle phenomenon of exclusion through disciplinary protectionism. Hayek was well aware of this twofold danger. Hayek didn’t view himself in the way the grandiose term"polymath" usually suggests but rather as a man interested in all aspects of human endeavor, none of which can easily be hived off without at some point skewing the study. (p.xiii)

<Erol Başar, "Views of Hayek, Hebb, and Heisenberg: Toward an Approach to Brain Functioning">

ポストモダン脳科学?この論文を読む限り、トンデモである(英語も滅茶苦茶。誰か校正する人いなかったのか…?)

<Joshua Rust, "Hayek, Connectionism, and Scientific Realism">

現在の認知科学、心の哲学の文脈にHayekの『感覚秩序』を位置づける。Hayekは、(一方で精神的秩序は物理的秩序の部分集合であるとしながら)物理的秩序も精神的秩序の部分集合である、という考え方にコミットしているので、科学的実在論を前提とするコネクショニズムやSearleらの議論とはそもそも問うている問いが違うのだ、という指摘は面白い。それにしてもSearleとかFodorはつまらな(ry

Hayek's operative question concerns the gap between two different kinds of mental orders: that of our ordinary classificatory system and that of the classificatory system of an idealized someone who is very much like us except with the addition of great deal of investigative experience. Hayek's gap, then, is epistemic rather than ontological. When he speaks of a potential isomorphism between mental and physical orders, this is to be understood in terms of the distance between how the world is ordinarily construed (the manifest image) and how a future scientist might come to construe it (however limited). (p.42)

<Don Ross, "Hayek's Speculative Psychology, the Neuroscience of Value Estimation, and the Basis of Normative Indivualism">

むむ…難しい。神経科学についての知識不足ゆえ満足に理解できたとは言い難い。Hayekが最後まで記述的個人主義を保持していたという前提には疑問があるが、規範的個人主義を擁護するRossのやり方は面白い。

For humans, relatively thoughtless mimesis and obedience to norms come naturally and easily; but self-creation and self-maintenance is the difficult and often traumatically challenging project that consumes much of the energy expenditure of a normal life. This is the basis of, and naturalistic justification for, normative individualism. A person's self is her most precious asset, which demands continuous investment. If its integrity is cast into doubt her capacity to enter into mutually beneficial exchanges - the fundamental survival strategy of Homo sapiens - is threatened, and she risks paying ruinous costs through denial of status and emotional bonds. (p.68)

<Edward Feser, "Hayek, Popper, and the Causal Theory of the Mind">

本書で一番面白かった論文。感想はTwitterに載せたので繰り返さない。

We have had to assign a certain interpretation to the otherwise meaningless symbolic representations we have decided to count as the 'premises' and 'conclusion' of a given inference the machine is to carry out, and we have had to design its internal processes in such a way that there is an isomorphism between them and the patterns of reasoning studied by logicians. (p.77)

"[F]or any any causal system there is a limit to the complexity of other systems for which the former can provide the analogon of a description or explanation, and that this limit necessarily excludes the possibility of a system ever describing or explaining itself. This means that, if the human mind were a causal system, we would necessarily experience in discussing it precisely those obstacles and difficulties which we do encounter and which are often regarded as proof that the human mind is not a causal system." (F.A. Hayek, "Within Systems and About Systems" Paragraph 1)

Natural selection favors survival value, not truth or falsity. Hence, you are not going to get truth or falsity from natural selection, and neither will you get from it the concepts that thoughts and statements - the sorts of things that are susceptible of being either true or false - presuppose. (p.95)

<James R. Wible, "C.S. Peirce and F.A. Hayek on the Abstract Nature of Sensation and Cognition">

比較の題材としてPeirceとHayekを取り上げるところにはセンスを感じるが、残念ながら内容は皮相的。

"The connection between the afferent and efferent nerve, whatever it may be, constitutes a nervous habit, a rule of action, which is the physiological analogue of the major premiss." (C.S. Peirce, Studies in Logic by Members of the John Hopkins University p.422)

"Now, Mill seems to have thoughtlessly or nominalistically assumed that a fact, is the very objective history of the universe for a short time, in its objective state of existence in itself. But that is not what a fact is. A fact is an abstracted element of that." (C.S. Peirce, Reasoning and the Logic of Things p.198)

<Jan Willem Lindemans, "Hayek's Post-Positivist Empiricism: Experience Beyond Sensation">

この論文も面白かった。明示化可能な知識を可能にする明示化不可能な超越論的形式は、神経インパルスが走るために整備されていなければならないシナプス結合のネットワークなんだよね。それもまた(広い意味での)「経験」の産物であるゆえ、Hayekの哲学はKantianではなく、むしろ「HumeとともにHumeを超える」経験論であると。

Like in computers, the rules on how it [the brain] can be 'reprogrammed' are present in the brain, while the actual inputs for this reprogramming ultimately come from outside the brain... The external environment that 'does the programming' is not consciously aiming at something - although some activities, like propaganda, could be interpreted as real neural programming. (p.165 n12)

In the case of individual experience, the co-occurrence of impulses precedes the formation of a connection. However, in the case of racial experience, the 'conjecture' of a connection precedes the occurrence of any impulses. For instance, if the connection between. 'brightly colored animal' and 'poison' is innate, such an animal will never have experienced, not even in a pre-sensory manner, the simultaneous occurrence of bright colors and poison before the connection was present – nor will one of the ancestors ever have had such an experience. (p.160)

<Giandomenica Becchio, "A Note on the Influence of Mach's Psychology in The Sensory Order">

『感覚秩序』では一回もHumeが引用されていないということには気付かなかった。Hayekの認知科学はHumeよりはむしろMachの影響が強いんだね(間接的にはHumeの影響を受けていると言えるかもしれないが)。Machの『感覚の分析』を読んでみたくなった。

"[A]lthough the theory developed here was suggested in the first instance by the psychological views which Ernst Mach has outlined in his Analysis of Sensations and elsewhere, its systematic development leads to a refutation of his and similar phenomenalist philosophies: by destroying the conception of elementary and constant sensations as ultimate constituents of the world, it restores the necessity of a belief in an objective physical world which is different from that presented to us by our senses." (F.A. Hayek, The Sensory Order 8.37)

<Gloria Zúñiga y Postigo, "The Emergence of the Mind: Hayek's Account of Mental Phenomena as a Product of Spontaneous Order and Social Orders">

"While there can ... be nothing in our mind which is not the result of past linkages (even though, perhaps, acquired not by the individual but by the species) , the experience that the classification based on the past linkages does not always work, i.e., does not always lead to valid predictions, forces us to revise that classification." (F.A. Hayek, The Sensory Order 8.14)

"The task of science is thus to try and approach ever more closely towards a reproduction of this objective order - a task which it can perform only by replacing the sensory order of events by a new and different classification." (ibid., 8.28) 

He [Hayek] does not conflate metaphysics with epistemology by suggesting that there is no reality beyond perception. In fact, he recognizes that perception is always an interpretation of reality (TSO 6.36). Yet, he argues that 'any attempt to reduce [the task of science] to merely a complete description of the phenomenal world' must break down because in the sensory order events are not classified in the same way as in the objective realm (TSO 8.30). Hayek seems to believe that the recognition of this distinction in classification in the subjective and objective realms is one of the main contributions of TSO [note: TSO vii]. This realist perspective, however, has been overlooked. (p.187)

<Chiara Chelini, "Hayek's Self-Organizing Mental Order and Folk-Psyochological Theories of the Mind">

本書で一番つまらなかった。「メンタライジング」はHayekの分類理論では説明できないという前提で論が進んでいくが、これはHayekの分類理論を理解していない証左。

<Chor-yung Cheung, "Beyond Complexity: Can The Sensory Order Defend the Liberal Self?">

言いたいことは分かるが、自由主義的な自我概念を無条件に価値あるものと見なすことを、Hayekならあくまで帰結主義的に認めるだろうな。少なくとも、そのような自我概念を共有していない人に対する説得力は弱いだろう。

<Thierry Aimar, "Cognitive Opening and Closing: Toward an Exploration of the Mental World of Entrepreneurship">

私の興味の範囲から若干ズレるので割愛。

<Troy Camplin, "Getting to the Hayekian Network">

どちらかというとネットワーク理論の紹介。整理されているとは言い辛いが、内容は面白い。

If everything in the universe is self-organized, where do we get this idea, resurrected by socialists, that conscious design is the norm? Humans, like most animals, evolved to immediately, instinctively recognize the signs of others of their species. With wolves, lions, and other strongly territorial species, scent signs mark territory to warn off others. But humans are more visual, so we leave visual evidence of order. As a consequence, we associate the presence of order with an orderer or designer, and the development of creationist theories to explain nature, soul theories to explain the mind, and governments to order society. Darwinism and self-organization theories replaced creationist theories (for most people); top-down soul theories, including Descartes' homunculus theory, evolved into CAS theories of the brain's network structures, out of which the mind emerges; top-down social theories (where the hierarchical structure of the Catholic church was reproduced in other Western social structures, for example) gave way to Adam Smith's bottom-up self-organizing "invisible-hand" theory. While life and mind have continued to evolve toward theories of self-organization, our social theories took a u-turn when socialism emerged as a respectable theory of economic ordering. The designer fallacy, increasingly abandoned in theories of life and mind, was readopted in our social theories. (p.260)

"Coevolving adaptive agents attempting to predict one another's behavior as well as possible may coordinate their mutual behavior through optimally complex, but persistently shifting models of one another." (Stuart Kauffman, The Origins of Order p.404)

"[W]hen an environment is stable, there is a selective pressure for learned abilities to become increasingly innate. That is because if an ability is innate, it can be deployed earlier in the lifespan of the creature, and there is less of a chance that an unlucky creature will miss out on the experiences that would have been necessary to teach it." (Steven Pinker, The Language Instinct p.244) 

"In general, a range of brain circuits, defined by our genes, provide "pre-representations" or hypotheses that our brain can entertain about future developments in its environment. During brain development, learning mechanisms select which pre-representatations are best adapted to a given situation. Cultural acquisition rides on this fringe of brain plasticity. Far from being a blank slate that absorbs everything in its surroundings, our brain adapts to a given culture by minimally turning its predispositions to a different use. It is not a tabula rasa within which cultural constructions are amassed, but a very carefully structured device that manages to convert some of its parts to a new use. When we learn a new skill, we recycle some of our old primate brain circuits - insofar, of course, as those circuits can tolerate the change." (Stanislas Dehaene, Reading in the Brain p.7)

"[M]ore complex networks tend to fluctuate less and are more stable than simpler networks." (Mark Buchanan, Nexus p.146)

If we can avoid the temptation to retreat to less connected modularity, the egalitarian network will bring everyone up – so long as good rules and good institutions, decentralization, and avoiding the temptation to try to control the system reign. (p.277)

"If the loss of links pushes the network efficiency down and environmental volatility up past some critical level, the strongly homogeneous network structure will break down into a sparse, hierarchical structure, similar to a core-periphery and is accompanied with a breakdown in network efficiency." (Frank Schweitzer et al., "Economic Networks: The New Challenges" in Science, 325 (5939) p.423)

Our hypersensitivity to intention may make it difficult to persuade belief in spontaneous orders. We want to believe in creationism or intelligent design, whether in cosmology, biology, government, or economy. Yet, science helps us understand the world beyond how we are programmed to see it. (p.280)

2012年8月16日木曜日

【メモ】 Chandran Kukathas, Hayek and Modern Liberalism

Since the primary concern of this study is to evaluate Hayek's enterprise, and so to assess his contribution to modern political theory, and liberal theory in particular, its focus is on precisely the question of the coherence of the philosophical assumptions which underlie Hayek's attempt to offer a justification of the liberal social order. The conclusion it reaches is that Hayek's attempt fails because the philosophical assumptions which underpin his social theory are inconsistent with those underlying his attempt to justify liberal principles. It tries to show, first, how Hayek's view of the nature of human knowledge and his account of the nature of social order lead him to develop arguments for liberalism grounded in a profoundly anti-rationalist stance; and secondly, how his desire to secure this defence in a set of normative principles upholding individual freedom lead him to adopt, at the same time, a more rationalist approach to the problem of justifying his liberal theory of justice. (p.17)

Kant's reasoning appears to be circular. He argues that we must think of ourselves free because we are born under moral laws and then claims that we must be under moral laws because we think of ourselves as free. Kant himself notes this in the Groundwork (Groundwork of the Metaphysics of Morals p.111). While he does attempt to answer this objection here, his remarks in the Critique of Practical Reason are more illuminating. There he argues that freedom is the necessary condition of the moral law's existence, but the moral law is the only condition under which freedom can be known. Freedom would exist regardless of our awareness of the moral law; but only because we do know the moral law are we aware of our freedom. Freedom is thus the ratio essendi of the moral law, but the moral law is the ration cognescendi of freedom (Critique of Practical Reason p.4n). (p.33)

Justice is therefore the aggregate of those conditions under which the will of one person can be conjoined with the will of another in accordance with a universal law of freedom (The Metaphysical Elements of Justice p.34)

In so far as [Kant] thinks that justice, like morality, is not to be justified by material and subjective ends, his [theory of justice] is a deontological theory. Yet in so far as his legal and moral theory are founded on a theory of objective ends, it appears to be teleological. The objective end Kant presents is that condition in which each individual's freedom is in harmony with the freedom of all others. And the reason he gives for seeing this as an objective end is that the only (ultimate) end of creation or existence is man, who is the only being whose causality is teleological or directed to ends, and who is yet unconditioned by nature because he is free (Critique of Teleological Judgement p.99). Indeed man is distinguished by his freedom to choose his own ends or purposes, and for this reason the condition which offers the greatest scope to human self-legislated ends is the objective end that should be sought. This is the real end of nature: to attain that condition in which human ends can flourish. (p.38)

If [Hume and Kant's] theories do in fact stand in irreconcilable conflict, as separate defences of the liberal philosophy, Hayek's restatement of liberalism would have either to embrace one and reject the other, or risk presenting an account of liberalism which rests on inconsistent premises. It is the latter course that Hayek chooses, for he sees no fundamental incompatibility between the views of Hume and Kant as far as their social philosophies are concerned. (p.44)

Hayek's critique of constructivist rationalism, and his account of the evolution of rules of conduct in the theory of spontaneous order, are strikingly Humean in character. His political philosophy is, to a considerable extent, founded in Humean assumptions about the nature of society and the place of justice within it. He sees morality as a social institution composed of rules of conduct which have evolved with the social order and have derived their legitimacy, ultimately, from the fact that they facilitate the co-ordination of human activities and enhance society's prospects of survival. He thus follows Hume in regarding justice as an institution which enables man to cope with his circumstances, and denying  that the rules of justice can be discovered by reason. At the same time, however, Hayek appears to reject the idea of such a 'conservative' justification of the liberal order. In attempting to uncover the principles of a liberal order he turns to a Kantian emphasis on the importance of freedom as the master principle of the Great Society. His conception of freedom as 'independence of the arbitrary will of another' is indeed strikingly Kantian, emphasizing as it does that liberty means 'the absence of a particular obstacle - coercion by other men' (The Constitution of Liberty p.19). (p.45)

[Unlike Kant, for Hayek] [t]here are no fixed categories of understanding but only constantly adjusting mechanisms of perception; man's capacity to know is developing as much as his knowledge is growing. (p.50)

Hayek differs from Kant in another important way. He does not draw a distinction between 'appearance' and 'reality' or ask if or how we can know 'things in themselves' (The Sensory Order pp.4-5). (p.50)

One important aspect of his epistemology, however, is particularly Kantian: his account of knowledge as rule-governed. In 'The Primacy of the Abstract' he describes the mind according to 'the system of abstract rules which govern its operation (New Studies p.43) (...) While Kant presents a metaphysical, rather than a physiological account of the rule-guided nature of knowledge, his views closely resemble, and illuminate, Hayek's theory. In the first Critique Kant characterizes the faculty of understanding as a 'faculty of rules' which is always 'investigating appearances, in order to detect some rule in them' (A p.126). More than this, rules are necessary if we are to 'know', for these rules enable us to organize experience: 'without such rules appearances would never yield knowledge of an object corresponding to them' (A p.159, B p.198). Kant's concept of the understanding is much like Hayek's conception of the mind as a system of abstract rules, applied when an object or 'appearance' is encountered, so that these objects may be 'classified' or 'known'. (pp.51-52)

Our rules for establishing true coherences - as against illusory ones - are and must remain indeterminate. Any rules we have must be applied, of course: and, to do this, we may have additional rules for their application. But we cannot go on having specific rules for the application of specific rules for the application of specific rules ad infinitum. At some point we must have "rules" of application (if we can call them that) which we cannot specify, because we must simply dwell in them in a subsidiary way. They are part of our deepest commitments. But for this reason they are not specifiable. (Michael Polanyi and Harry Prosch, Meaning p.61)

That erroneous view [constructivist rationalism] is closely connected with the equally false conception of the human mind as an entity standing outside the cosmos of nature and society, rather than being itself the product of the same process of evolution to which the institutions of society are due. (Law, Legislation and Liberty Vol.1 p.5)

Having concluded in the Sensory Order, and in his essays on the philosophy of mind, that the individual was incapable of distancing himself from the cosmos of nature so as to account fully for its operation, Hayek maintains that it is similarly impossible for man to distance himself sufficiently from the cosmos of society to construct a complete account of its structure. Such an account, he argues, would involve an attempt to produce a complete explanation of how society and its institutions have evolved and will evolve, by people who, at the same time, do not know how they themselves are evolving as the members of those institutions, or know how their explanations may affect the development of those institutions. (p.60)

While rules may thus be defended on the basis of their past and current effectiveness or compatibility with social life or with the community's 'sense of justice', they cannot be defended on the basis of a future end-state which comprises the 'total consequences' of those rules (LLL Vol.2 p.19). (p.65)

From Hayek's anti-constructivist perspective, however, Rawls's enterprise appears misconceived. What Rawls is trying to do is to articulate what cannot be articulated. The assumptions made in this attempt are not only implausible but, in fact, presume the absence of problems whose solution is the product (rather than the pre-condition) of justice. (p.69)

The background of unarticulated rules can never be captured to form the first premiss of a syllogism defining justice. It is not that argument about justice and equity is not possible; rather, the idea of criticizing the justice of the social structure as a whole from the perspective a putative sense of justice elicted from that social structure is mistaken. (p.71)

Institutions of justice do not reflect a shared conception of justice. Rather, they reflect man's epistemological predicament: he is able neither to articulate fully his understanding of right and wrong nor to know enough about his world to be certain about his (and others') judgements. Institutions make up for this lack because they embody rules of conduct which have been tested by experience. What individuals do share (to varying extents) is confidence in the appropriateness of the institutions serving this function. (p.71)

The kind of philosophical undertaking Hayek denies is not that which questions the values implicit in social practices but that which seeks at one and the same time to question all social values (New Studies p.19). Implicit in this attitude is the assumption that the task of political philosphy can never be completed, for criticism will always have a place in society in which values change. That there is no single 'reasonable and workable conception of justice' which philosophers can identify or construct does not thus signify the practical irrelevance of social theory but, rather, explains why it will always be a vital part of polity. (p.73)

It is not enough merely to say that the parties in [Rawls's] OP [=Original Position] know all the relevant and true beliefs concerning human nature and social theory; what is needed if we are to know how we would judge from that perspective is not just the assumption that we know: we need that true social theory before us. Rawls does not offer us any such theory. Indeed he cannot; for it is not possible to present a social theory which is not, to some extent, influenced by the interests and assumptions of the theorist. (p.75)

Any construction of a point of view from which to outline [individual] entitlements would represent not a view of persons in society but the view of the single individual involved in that construction. (p.77)

On this basis Hayek suggests that rules of justice cannot be constructed in the abstract but must be the outcome of the social process. Although the activity of theorizing a part of that process, it is no more than that: a part of the process. There can be no blueprints produced by political theory, and all evaluation of the rules and social processes that dominate society must begin by acknowledging the existing tradition within which all social and moral discourse takes place. (pp.79-80)

The contradiction into which Hayek seems to be locked is one in which he is forced to claim that there can be no social theory that can guide our evaluation of the entire structure of our institutions, while conceding that a considerable social theory, explaining the purpose served by our institutions, is necessary for us to evaluate and alter our rules of conduct. (...) This is an important problem. It makes it hard, if not impossible, for Hayek to make any positive claims about the good society: about the principles which govern its operation or how we might move towards it. His anti-constructivist epistemology suggests that we can never comprehend the workings of society well enough to know what kind of rules would best sustain it. (pp.82-83)

By order we shall throughout describe a state of affairs in which a multiplicity of elements of various kinds are so related to each other that we may learn from our acquaintance with some spatial or temporal part of the whole to form correct expectations concerning the rest, or at least expectations which have a good chance of proving correct. (LLL Vol.1 p.35)

The point is that, while it is easy to protect a particular person or group against the loss which might be caused by an unforseen change, by preventing people from taking notice of the change after it has occurred, this merely shifts the loss onto other shoulders but does not prevent it. (Individualism and Economic Order p.21n)

Herein lies the chief merit of the liberal concern for, and emphasis upon, procedural or formal justice rather than the justice of substantive outcomes, for a concern for procedural justice does not mean indifference to, or unwillingness to consider, the nature of the good for man. The concern for procedures betrays a recognition that it is largely because of the rules of justice, which seek to preserve the freedom to pursue the good, that the good can be discovered. (p.118)

Law in its ideal form might be described as a "once-and-for-all" command that is directed to unknown people and that is abstracted from all particular circumstances of time and place and refers only to such conditions as may occur anywhere and at any time. (...) [A]s we move from commands to laws, the source of the decision on what particular action is to be taken shifts progressively from the issuer of the command or law to the acting person. (The Constitution of Liberty p. 218)

In such an effort towards the development of a body of rules, most of which are accepted by the members of society, there will therefore also exist an 'objective' (in the sense of being inter-personally valid, but not of universal [validity] — because it will be valid only for those other members of the society who accept most of its other rules) test of what is unjust. (LLL Vol.2 p.42)

The mind cannot step outside itself to view its own operation. Since the mind, as he [Hayek] conceives it, is a system of rules embedded in a social structure also constituted by rules of conduct, it is similarly impossible for the mind to step outside society and view its operations from beyond. The difficulty of separating mind from society tells against the possibility of the mind comprehending the operation of the whole. (p.180)

This is, perhaps, the main significance of Hayek's Road to Serfdom - not the cogency of his doctrine, but the fact that it is a doctrine. A plan to resist all planning may be better than its opposite, but it belongs to the same style of politics. And only in a society already deeply infected with Rationalism will the conversion of the traditional resources of resistance to the tyranny of Rationalism into a self-conscious ideology be considered a strengthening of those resources. (Michael Oakeshott, 'Rationalism in Politics' p.21)

What remains disturbingly unclear in all this, however, is the relationship between the conservative elements in Hayek, which deny the power of reason successfully to reconstruct human institutions and reject the possibility of rationally justifying them, and the more rationalist Hayek who regards traditions in a more instrumental manner. (p.189)

[In contrast to utilitarianism] His [Hayek's] defence of the liberal order is based not on the claim that its rules will produce end-states we would choose if we knew what alternatives were available, but on the contention that the rules of the liberal order enable us to adapt to a changing environment which is always creating states of affairs which we can never wholly anticipate, let alone choose. (p.197)

2012年4月29日日曜日

市場競争の意味

The correspondence of expectations ... is brought about by a process of trial and error which must involve constant disappointment. The process of adaption operates, as do the adjustments of any self organising system, by what cybernetics has taught us to call negative feedback: responses to the differences between the expected and the actual results of actions so that these differences will be reduced. This will produce an increased correspondence of expectations ... (F.A. Hayek, Law, Legislation and Liberty)
実際、負のフィードバックによって秩序が達成されるという洞察は、サイバネティクスが初めて体系的に理論化したといえ、何もサイバネティクスが創始した考えではなく、もともとは市場についての理解にこそその起源を持つ。
long before Claude Bernard, Clerk Maxwell, Walter B. Cannon, or Norbert Wiener developed cybernetics, Adam Smith has just as clearly used the idea in The Wealth of Nations. The "invisible hand" that regulated prices to a nicety is clearly this idea. In a free market, says Adam Smith in effect, prices are regulated by negative feedback. (G. Hardin, Nature and Man's Fate)
ただし、これは時間と努力さえかければ学習過程が何らかの最終状態――主流派の「均衡」概念のような――に達しうるというわけでは決してない。オドリスコルとリッツォの次の意見に、おそらくハイエクも賛同するだろう。
A theory of evolved orders is not a theory of optimality or efficiency, precisely because it is a process not an end state theory ... It is not what competition does to fulfill our expectations that commends it; it is what we would not have expected it to do that commends it. (O' Driscoll, G. and Rizzo, M., The Economics of Time and Ignorance)
抽象的・一般的ルールを遵守しながら、行為主体は試行錯誤のプロセスを通じて進まなければならないが、このプロセスは不可避的に、常に一定数の主体の期待が 裏切られることを意味するだろう。特定の不確実性の存在によってのみ、より一般的な不確実性を最小化することができるのである。
[Market-determined rewards are] incentives which as a rule guide people to success, but will produce a viable order only because they often disappoint the expectations they have caused when relevant circumstances have unexpectedly changed. It is one of the chief tasks of competition to show which plans are false. (F.A. Hayek, Law, Legislation and Liberty)
期待が裏切られる過程で深刻な損害を受ける主体がいるということは不幸な副作用であるが、それを避けることはできない。というのも、介入は知識の発見・伝達・貯蔵を妨げ、それによって富の創造過程を妨げ、すべての人の好機を害するからである。

最後に、知識の発見手続きという意味における、市場競争と科学の方法との同型性について。
If we do not know the facts that we hope to discover by means of competition, we can never ascertain how effective it has been in discovering those facts that might be discovered. ... The peculiarity of competition - which it has in common with scientific method - is that its significance cannot be tested in particular instances where it is significant, but is shown only by the fact that the market will prevail in comparison with any alternative arrangements. The advantages of accepted scientific procedures can never be proved scientifically, but only demonstrated by the common experience that, on the whole, they are better adapted to delivering the goods than alternative approaches. (F.A. Hayek, "Competition as a Discovery Procedure")
科学の方法は自然界の普遍的な事実、つまり法則を発見するのに対して、市場競争はあくまでその特定の状況でのみ有効な暫定的な事実を発見するがゆえ、後者の有用性は前者に比べて理解されにくいと言える。

2011年12月18日日曜日

ハイエクの自生的秩序概念と目的独立性について

ハイエクの自生的秩序概念に関して、読書会で「設計主義的な伝統が自生的に生じることはありえないのか」という質問があった。これは私自身もハイエクに初めて触れたときに抱いた疑問で、彼の自生的秩序概念を理解する上で非常に重要な疑問だと思うので、本稿を機会に詳しく説明してみたい。結論から言うと、ハイエクは秩序の起源としての自生性をやみくもに絶対視するのではなく、むしろ自生的起源に伴うことが期待される「目的独立性」(purpose-independency)を重視するのである。自生的に進化してきた暗黙的なルールであろうと、明文化され権力によって担保されたルールであろうと、ハイエクにとって重要なのは、そのルールが目的独立的な秩序を生み出すものであるかどうか、である。では、目的独立的な秩序を生み出すルールとは、具体的にどのようなルールであろうか。
ハイエクによれば、あるルールが目的独立的な秩序を生み出すルールであるためには以下の性格を備えていなければならない。すなわち、(1) 特定の集団を優遇しないという意味で「一般的」(general)であること、(2) 目に見える具体的な帰結を追求しないという意味で「抽象的」(abstract)であること、(3)「~せよ」と積極的なオブリゲーションを課すのではなく「~するなかれ」と特定の行為を禁止する形態をとるという意味で「消極的・否定的」(negative)であること。これらは相互に含意し合うので、一つの条件を満たしていながら他の条件を満たしていないルールを想定することはおそらくできない。むしろ、これらは目的独立的な秩序を生み出す諸ルールが共通して備えているべき異なる側面を描いたものと見なすのがいいだろう。他方の「目的依存的」(purpose-dependent)な秩序(コスモスと対比された意味でのオイコス)の諸ルールは特殊的・具体的・積極的なのであるが、この「オイコス図式」を、特定の目的を持たない単なる「場」であるはずの市場秩序=カタラクシーに適用し、これをある統一的なコード(これは同時に主観的なコードでしかありえない)の元に解釈しようとするのが、設計主義の錯誤に他ならない。
さて、ここで冒頭の質問に戻ろう。ハイエクにとって重要なのは起源としての自生的性格そのものよりはむしろ秩序の目的独立性であることが分かった今、我々は「自生的に生じた設計主義的な伝統」を忌憚なく「設計主義」の陣営の方に括ることができよう。というのも、(起源としての自生性ではなく)目的独立性こそがハイエクにとって設計主義/非設計主義を区別するメルクマールに他ならないからだ。しかし、ここでもう一つ別の疑問が提起されるかもしれない。つまり、「目的独立的なルールが、純粋な熟慮に基づいて設計されることは可能かどうか」という疑問である(土井 2010)。ハイエクが重視するのが専らルールの目的独立性であるならば――つまりルールの起源としての自生性が重要でないならば――そこから導かれる秩序はもはや「自生的秩序」である必要すらないのではないか、ということである。
この疑問に対してハイエクは「庭師」の比喩で答えるであろう。
農夫や庭師が植物を栽培する(cultivate)場合、彼は決定環境の一部しか知らずそれを管理(control)できない。そしておそらく、賢明な立法者や政治家も、社会的過程の力を管理するのではなく、むしろ養成する(cultivate)ことを試みるであろう。(Hayek 1967)
人間が植物の成長を促すためにできることと言えば、水を与えたり、日光を確保するなどの「適切な条件整備」しかない。この「適切な条件整備」は、過去の庭師たちの試行錯誤の末に編み出された経験的な知識によるものである。ハイエクが否定するのは設計主義的発想に基づく「ゼロからのルールの制定」であって、ルールの整備に人為的な要素が加わること自体を否定しているわけでは決してない。この点に関して、複雑系研究者スチュアート・カウフマンの記述が示唆的である。
もし凍結した秩序状態に系が深くはまりすぎてしまうと、柔軟性が足りなくなって、成長に必要な遺伝的活動の複雑な連鎖が調和的には働かなくなる。逆に、もし気体的なカオス状態に系が深くはまりすぎてしまうと、十分に秩序化することができないであろう。カオスの縁――秩序と意外性の妥協点――の近辺にあるネットワークが、複雑な諸活動を最も調和的に働かせることができるし、また進化する能力を最も兼ね備えているのである。(Kauffman 1995)
カウフマンの言うように進化の源泉がカオスの縁にあるのだとすると、我々はそのようなカオスの縁を社会の中に作為的に作り出すことによって進化を促すことさえできるかもしれない。最後に、橋本努の言葉で締めたい。
「庭師」の理性は、庭の手入れによって、そこから生じる未来の秩序を、後見的なものとして発見するのである。自生化主義の庭師は、庭の帰結をデザインするのではなく、予期しえない進化を含めて、植生の生成過程が自生的であることに喜びを見出している。彼は、「よりよい庭」を目指して介入するが、しかし何がよりよい庭であるのかについては、つねに問題化しながら、生成の過程に関わりつづける。(橋本 2005)
【参考文献】
  • 土井崇弘 (2010) 「ハイエクの自生的秩序論と進化論に関する予備的考察」『中京法学』44(3・4), pp.291-321.
  • 橋本努 (2005) 「ポスト近代社会の進化論:社会の発展は自生化主義で見よ」『理論戦線』no.80, 2005 Summer, pp.124-145.
  • Hayek, F.A. (1967) Studies in Philosophy, Politics and Economics, Chicago: University of Chicago Press.
  • Kauffman, Stuart (1995) At Home in the Universe: The Search for Laws of Self-Organization and Complexity, New York: Oxford University Press 〔米沢富美子監訳『自己組織化と進化の論理―宇宙を貫く複雑系の法則』日本経済新聞社,1999年〕.

2011年12月5日月曜日

【書評】 ハイエクのポリティカル・エコノミー : 秩序の社会経済学 (スティーヴ・フリートウッド)

原著:Steve Fleetwood, Hayek's Poltical Economy: The Socio-economics of Order

本書は「批判的実在論」(critical realism)という新しい見地からハイエク哲学の変遷を描くという、一風変わった研究書。経済学の領域に批判的実在論を適用した研究ではトニー・ローソンの『経済学と実在』(Economics and Reality)が有名だが、試みとしては本書の方が初めてらしい(邦訳はローソン本の方が先)。

フリートウッド氏は、ハイエクの著作を三つの時期に区分し、経済学、法学、政治学、心理学など社会・人文科学の諸分野にまたがる彼の社会経済学の発展を、それを根底で支える哲学の変遷から説明する。1936年までのハイエクをハイエクⅠ(本書ではほとんど論じられない)、1936年から1960年までのハイエクをハイエクⅡ、1960年以降のハイエクをハイエクⅢと呼ぶ。ハイエクⅠは「狭い技術的な経済学」に固執する、主流派と同じ実証主義者であった。しかし、すでに1936年の時点で、ハイエクは実証主義と決裂し、主流経済理論を放棄し始める。1936年に書かれた論文「経済学と知識」("Economics and Knowledge")が、ハイエクⅡの出発点である。1936年以降のこの時期、ハイエクは知識、均衡、人間主体についての思索を深めてゆくのであるが、フリーウッド氏によると、この時点でのハイエクには、社会構造、とりわけ振るまいのルール(rules of action)に関するなんらかの適切な把握が欠けていたために、知識の発見・伝達・貯蔵を促進する上での情報伝達システムの役割と効力とを、誇張せざるをえなかった。フリートウッド氏は、ハイエクⅡの社会構造についての認識の欠落を、この時期の彼の哲学的立場の帰結と見なす。すなわち、認識論としての主観的観念論(subjective idealism)と、存在論としての(拡張された)経験的実在論(empirical realism)を総合する立場である。フリートウッド氏はこの総合された立場を「超越論的観念論」(transcendental idealism)と呼び、科学的探究におけるその現れが実証主義であるとする。拡張された存在論というのは、通常の超越論的観念論者が感覚与件に与えられる事象にのみ存在論的ステータスを付与するのに加えて、ハイエクⅡは絶え間なく変化する事象よりも深層にある領域、つまり主体による想念(conception)の領域の実在性をも認める、ということである。彼はもはや「与件」を人間による同定から独立したものとみなすことができず、主体の主観的な想念と密接に結びついているものとして取り扱う。これがハイエクⅡと実証主義とを隔てる分断点である。

しかし、ハイエクⅡの認識論としての主観的観念論が、社会科学においては解釈学的基礎づけ主義(hermeneutic-foundationalism)として姿を現すが、この立場が、社会構造を含む適切な存在論を発展させるのを妨げた、とフリートウッド氏は診断する。その結果ハイエクⅡは、均衡は秩序についての妥当な考えではないと主張しておきながら、それに代わるものを提示することができなかったのである。

フリートウッド氏は言う(ここで言われているハイエクはハイエクⅡである):
Hayek's position in social science might usefully be interpreted as an overreaction to positivism, or more accurately, to scientism. Once Hayek recognises that for social scientists, the external world is not objectively given (pace classical empiricism and positivism), he does not stop at the correct view that it is mediated by, or dependent upon, agents' subjectively formed conceptions. He overreacts, making the hermeneutic-foundationalist, and as I shall show, subjective-idealist, presumption that the social world is determined by, or exhausted by, agents' conceptions. [原文改行] Hayek, in effect, empties his social ontology of real social material, leaving a residue of nothing more than conceptions, ideas, beliefs, attitudes, and so on, that is, ideal social material. (pp.28-29)
しかし1960年頃の(第二の)哲学的転換が、この状況を打開することを可能にした。ハイエクⅢは認識論としての主観的観念論と解釈学的基礎づけ主義を捨て去り、準超越論的実在論(quasi-transcendental realism)の哲学を採用する。彼は事象と想念とを実在と認める存在論をさらに拡張し、振るまいの社会的ルールという形態の深層構造を含めるようになる。経験的事象を生じさせる基底構造に迫ることによって、ハイエクⅢは「社会活動の変換モデル」(Transformational Model of Social Activity, TMSA)とフリートウッド氏が呼ぶものに近いものを展開し、市場過程あるいはカタラクシーについて彫琢を加え、最終的には、知識、無知、ルール、情報伝達システムという諸テーマの結合を可能にする洗練された社会理論を作り上げることができた。以上が、フリートウッド氏の大まかな筋書きである。

【感想、批評】

本書は非常に示唆に富んだ、面白い研究だった。1936年頃のハイエクの転換を実証主義からの離反と捉えるのはハイエク研究においてはありふれた見解だが、1960年前後の転換をどう考えるかについてはかなり論争があるし(時期区分の成否如何はここではあまり深く考えないことにする。1940年代の科学主義論文――"Scientism and the Study of Society"全三部構成、The Counter-Revolution of Science: Studies on the Abuse of Reason 所収――における個人主義的・解釈学的アプローチと、晩年の進化論的アプローチとの間にはあまりにも差があるので、この期間に何らかの転換があったのは間違いないだろう)、方法論的個人主義と文化的進化論の整合性の問題とも密接に繋がっているので、私も非常に興味がある。

しかし、残念ながら私は、(1960年頃の)この転換をハイエクの哲学的立場の変遷の帰結と見なすフリートウッド氏のテーゼには賛同できない。むしろ、ハイエクの哲学的立場は1936年頃以降一貫していて、転換したのは方法論だけなのではないか、というのが私の解釈である。というのも、科学主義論文で展開されている主観的観念論と解釈学的アプローチ(私はあえて「基礎づけ主義」という用語は使わない)は、ハイエクⅢの準超越論的実在論と整合的なのではないか、と思われるからである。私の見るところ、フリートウッド氏の科学主義論文の読みは(誤読とまでは言わないまでも)かなり偏っている。また、社会的質料(social material)の「実在性」をめぐるフリートウッド氏の言葉の使い方および議論の仕方に、非常に問題を感じる。例えば、フリートウッド氏は以下のように述べる:
Whilst it is, true that real social material such as social structures (unlike physical material) cannot exist independently of all perceptions of them, they nevertheless exist independently of any one person's particular perception of them. If, however, social material can exist independently of a particular agent's perception or identification of it, then for that agent it has an objective existence - and cannot therefore be ruled out of the field of inquiry. This runs counter to the subjective-idealist claim that social material is constituted in the cognitive activity of the transcendental subject. (pp.78)
あるいはこのようにも言われる:
The following discussion, couched as it is in terms of cognitive psychology, should not mislead us into thinking that social rules originate in the mind. Social rules of conduct are just that - social. Whilst they are, typically, internalised by agents via the (cognitive) learning process, they are not merely in and of the mind. They have an existence independent of any particular agent's identification of them. (pp.108)
さて、社会構造が認識から独立しているとは、一体どういう意味であろうか。そもそもそんな事態は可能なのだろうか。私には到底そのようには思えない。ある主体が、自分が従っている行為ルールに関して無意識であったり、自分を規定する社会構造に関して無知であることはありうるが、その社会的質料から影響を受けているのであれば、それを即ち(間接的な形であれ)「認識」していると言えないだろうか。(逆に影響を受けていないのであれば、それは社会的質料でもなんでもない)。例えば、暗黙的な行為ルールに従うことができるということは、人間社会の中に何らかのパターン・規則性を認識してそれを模倣することに成功している証拠であるし、社会構造の影響を受けることができるということは、その構造が問題になる(より広範の)「ゲーム」をすでに遂行的に理解している必要がある。したがって、私には「遂行」と「認識」の次元を区別する必然性が見出せない。主体がその社会的質料に関して無意識であれ無知であれ、実践の領域でその影響を受けているのであれば、それを(何らかの間接的な形であれ)「認識」しているのである。そういう意味で、社会構造などの社会的質料はすべて諸個人の主観的な想念に起源を持つし、想念と独立の実在性を持つことはありえないはずだ。科学主義論文でハイエクが言わんとしているのは、こういうことではないのか。ハイエクは言う:
The individuals are merely the foci in the network of relationships and it is the various attitudes of the individuals towards each other (or their ... attitudes towards physical objects) which form the current recognisable and familiar elements of the structure. (Hayek, "Scientism and the Study of Society" pp.284)
ハイエクⅡが想定する個人像は、複雑に相互作用しながら想念から彼らにとっての社会構造を創り上げていく、ネットワークの中の個人である。この「彼らにとっての」というのが重要である。ここに解釈学的なエレメントが入り込んでくる。というのも、我々(社会研究者)にこの社会構造が「見える」のは、我々も彼ら(研究対象)と同じゲームを遂行しているからに他ならない。批判的実在論の立場においても、振るまいの社会的ルールや社会構造などの社会的質料が研究の対象となりうるためには、我々は解釈学的アプローチを利用する他ないのである。フリートウッド氏が実在の深層領域に社会的質料を見出すことができたのも、暗黙裡に解釈学的アプローチを援用していたからに過ぎない。ローソン氏のハイエク解釈に対する批判の中で、Allen Oakley氏も同様の趣旨のことを述べている:
My alternative is to envisage critical realism and hermeneutics as consistent, compatible and complimentary methodological strategies required to maintain subjectivist ontology. Hermeneutics is to be envisaged as the means of inquiry that will enable economics to achieve the 'deep' analytical insights that are the hallmark of critical realism (Allen Oakley, The Revival of Modern Austrian Economics: A Critical Assessment of Its Subjectivist Origins, pp.16)
社会科学においては、認識論としての主観的観念論(およびそれに伴う主観主義的な存在論)は放棄不可能であるように思われるし、したがってまた解釈学的アプローチも放棄不可能のように思われる。ハイエクⅢもこれらの立場を放棄したとは私は考えない。ハイエクⅢへの転換はむしろ方法論的なもののみのように思われる。つまり、個人の想念を分析の中心に据える方法論から、振るまいの社会的ルールなどの社会的質料を分析の中心に据える方法論への転換である。この方法論的転換の理由は、フリートウッド氏も指摘するとおり、ハイエクが振るまいの社会的ルール、とりわけ暗黙的なルールの存在に気付いたからだろう。
In this case, the 'compositive method', which focuses upon creating social phenomena from the conceptions held by agents, becomes problematic. If agents do not discursively know and/or adequately conceptualise the structures that facilitate their action, then society cannot be composed out of these conceptions alone. (pp.84)
フリートウッド氏のこの解釈は全くその通りだと思う。ただ、ハイエクⅢはハイエクⅡの存在論・認識論を放棄する必要はない。なぜなら、社会構造が主体の主観的な想念に起源を持つことと、その構造をあたかも客観的な実在物であるかのよう扱うこととは、何ら矛盾しないからである。実際、主体にとってはその社会構造は客観的な実在物なのだから、社会研究者も同様のものとしてその概念を利用しても問題ないはずだし、個人の想念から出発するよりはその方が好都合な場合もある。暗黙的な行為ルールが研究の材料として入ってくるというのは、まさにそういう場合なのではないか。社会的質料が主体の想念に起源を持つということ、したがって主観主義的な存在論を受け容れた上で、社会的質料を(いわば括弧付きで)客観的な「実在」と呼ぶのであれば私は何ら異存はないし、ハイエクⅢの立場もおそらく同様のものだろう。本当は丹念な文献引用によってこれを示さなければならないのだろうが、残念ながら今の私にはその時間も能力もないので、以上の雑駁な議論でお許し願いたい。

最後に、フリートウッド氏がハイエクⅢに読み込む「社会活動の変換モデル」(Transformational Model of Social Activity, TMSA)について。私にはこれはハイエクの文化的進化論の単なる言い換えにしか思えないのだが、言い換えることに一体何のメリットがあるのだろうか。むしろ進化概念を用いた方が適応とか淘汰が言えるので、言い換えない方がいいのではないか、と思った。まだロイ・バスカーの著作を読んでいないので何とも言えないけど、本書を読む限りあまり魅力を感じることはできなかった。