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公地的悲剧 Tragedy of the Commons


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The Tragedy of the Commons 公地的悲剧
by Garrett Hardin, 1968
Published in Science, December 13, 1968

At the end of a thoughtful article on the future of nuclear war, Wiesner and York (1) concluded that: "Both sides in the arms race are ... confronted by the dilemma of steadily increasing military power and steadily decreasing national security. It is our considered professional judgment that this dilemma has no technical solution. If the great powers continue to look for solutions in the area of science and technology only, the result will be to worsen the situation."

J.B. Wiesner和H.F. York在一篇关于核子战争前景的发人深省文章结尾时说:「武器竞赛的双方都是…面对持续增强的军事力量和持续减弱的国家安全。深思之下,我们的专业意见认为这困局没有技术性的解决办法。如果大国只是在科学和科技这方面找寻解决办法,结果只会令情况恶化。」

I would like to focus your attention not on the subject of the article (national security in a nuclear world) but on the kind of conclusion they reached, namely that there is no technical solution to the problem. An implicit and almost universal assumption of discussions published in professional and semipopular scientific journals is that the problem under discussion has a technical solution. A technical solution may be defined as one that requires a change only in the techniques of the natural sciences, demanding little or nothing in the way of change in human values or ideas of morality.


In our day (though not in earlier times) technical solutions are always welcome. Because of previous failures in prophecy, it takes courage to assert that a desired technical solution is not possible. Wiesner and York exhibited this courage; publishing in a science journal, they insisted that the solution to the problem was not to be found in the natural sciences. They cautiously qualified their statement with the phrase, "It is our considered professional judgment. . . ." Whether they were right or not is not the concern of the present article. Rather, the concern here is with the important concept of a class of human problems which can be called "no technical solution problems," and, more specifically, with the identification and discussion of one of these. It is easy to show that the class is not a null class.


Recall the game of tick-tack-toe. Consider the problem, "How can I win the game of tick-tack-toe?" It is well known that I cannot, if I assume (in keeping with the conventions of game theory) that my opponent understands the game perfectly. Put another way, there is no "technical solution" to the problem. I can win only by giving a radical meaning to the word "win." I can hit my opponent over the head; or I can drug him; or I can falsify the records. Every way in which I "win" involves, in some sense, an abandonment of the game, as we intuitively understand it. (I can also, of course, openly abandon the game--refuse to play it. This is what most adults do.)


The class of "No technical solution problems" has members. My thesis is that the "population problem," as conventionally conceived, is a member of this class. How it is conventionally conceived needs some comment. It is fair to say that most people who anguish over the population problem are trying to find a way to avoid the evils of overpopulation without relinquishing any of the privileges they now enjoy. They think that farming the seas or developing new strains of wheat will solve the problem--technologically. I try to show here that the solution they seek cannot be found. The population problem cannot be solved in a technical way, any more than can the problem of winning the game of tick-tack-toe.


What Shall We Maximize? 我们要最大化什么?
Population, as Malthus said, naturally tends to grow "geometrically," or, as we would now say, exponentially. In a finite world this means that the per capita share of the world's goods must steadily decrease. Is ours a finite world?


A fair defense can be put forward for the view that the world is infinite; or that we do not know that it is not. But, in terms of the practical problems that we must face in the next few generations with the foreseeable technology, it is clear that we will greatly increase human misery if we do not, during the immediate future, assume that the world available to the terrestrial human population is finite. "Space" is no escape (2).


A finite world can support only a finite population; therefore, population growth must eventually equal zero. (The case of perpetual wide fluctuations above and below zero is a trivial variant that need not be discussed.) When this condition is met, what will be the situation of mankind? Specifically, can Bentham's goal of "the greatest good for the greatest number" be realized?

有限的世界只能养活有限的人口;因此到了最后,人口增长必然是零。(零增长的永恒大幅度上下波动是无关宏旨的变动,不在此讨论。)当条件符合,人类的情况会是怎样?明确地说,边泌 的目标:「最大数目的最大好处」能否实现?

No--for two reasons, each sufficient by itself. The first is a theoretical one. It is not mathematically possible to maximize for two (or more) variables at the same time. This was clearly stated by von Neumann and Morgenstern (3), but the principle is implicit in the theory of partial differential equations, dating back at least to D'Alembert (1717-1783).

不可能——理由有二,单是一个已足够。第一个理由是理论性。数学上,两个函数是不可能同时最大化。Neumann和Morgenstern已经清楚说明 ,其中的绝对原理是起码可以追溯至D'Alembert (1717-1783) 的偏微分方程式。

The second reason springs directly from biological facts. To live, any organism must have a source of energy (for example, food). This energy is utilized for two purposes: mere maintenance and work. For man, maintenance of life requires about 1600 kilocalories a day ("maintenance calories"). Anything that he does over and above merely staying alive will be defined as work, and is supported by "work calories" which he takes in. Work calories are used not only for what we call work in common speech; they are also required for all forms of enjoyment, from swimming and automobile racing to playing music and writing poetry. If our goal is to maximize population it is obvious what we must do: We must make the work calories per person approach as close to zero as possible. No gourmet meals, no vacations, no sports, no music, no literature, no art ... I think that everyone will grant, without argument or proof, that maximizing population does not maximize goods. Bentham's goal is impossible.

第二个理由是直接源于生物事实。任何生物要生存,必须有一个能源来源(例如食物)。能源用于两个目的:维生和工作。人要维持生命,每天需要1600 千卡路里(维生卡路里)。维生以外所做的一切可以定义为工作,由摄取的「工作卡路里」支持。工作卡路里不是只用于我们日常谈到的工作;所有享乐形式都需要:游泳、赛车、音乐,吟诗。如果我们的目标是人口最大化,我们要做什么是很明显。我们要每个人的工作卡路里最接近零。没有可口美食,没有度假,没有运动,没有音乐,没有文学,没有艺术……我以为无需争议或实证,大家都同意人口最大化不会使物品最大化。边泌的目标是不可能的。

In reaching this conclusion I have made the usual assumption that it is the acquisition of energy that is the problem. The appearance of atomic energy has led some to question this assumption. However, given an infinite source of energy, population growth still produces an inescapable problem. The problem of the acquisition of energy is replaced by the problem of its dissipation, as J. H. Fremlin has so wittily shown (4). The arithmetic signs in the analysis are, as it were, reversed; but Bentham's goal is still unobtainable.

我在达成以上的结论时,作出一贯的假定,问题就是取得能源。有了核能,有些人会质疑这假定。但是,即使有无穷能源,人口增长依然带来不可逃避的问题。正如J. H. Fremlin机智表达,取得能源的问题,被能源消散取而代之 。分析的算术符号正负倒转;但边泌的目标是不能达到。

The optimum population is, then, less than the maximum. The difficulty of defining the optimum is enormous; so far as I know, no one has seriously tackled this problem. Reaching an acceptable and stable solution will surely require more than one generation of hard analytical work--and much persuasion.


We want the maximum good per person; but what is good? To one person it is wilderness, to another it is ski lodges for thousands. To one it is estuaries to nourish ducks for hunters to shoot; to another it is factory land. Comparing one good with another is, we usually say, impossible because goods are incommensurable. Incommensurables cannot be compared.


Theoretically this may be true; but in real life incommensurables are commensurable. Only a criterion of judgment and a system of weighting are needed. In nature the criterion is survival. Is it better for a species to be small and hideable, or large and powerful? Natural selection commensurates the incommensurables. The compromise achieved depends on a natural weighting of the values of the variables.


Man must imitate this process. There is no doubt that in fact he already does, but unconsciously. It is when the hidden decisions are made explicit that the arguments begin. The problem for the years ahead is to work out an acceptable theory of weighting. Synergistic effects, nonlinear variation, and difficulties in discounting the future make the intellectual problem difficult, but not (in principle) insoluble.


Has any cultural group solved this practical problem at the present time, even on an intuitive level? One simple fact proves that none has: there is no prosperous population in the world today that has, and has had for some time, a growth rate of zero. Any people that has intuitively identified its optimum point will soon reach it, after which its growth rate becomes and remains zero.


Of course, a positive growth rate might be taken as evidence that a population is below its optimum. However, by any reasonable standards, the most rapidly growing populations on earth today are (in general) the most miserable. This association (which need not be invariable) casts doubt on the optimistic assumption that the positive growth rate of a population is evidence that it has yet to reach its optimum.


We can make little progress in working toward optimum population size until we explicitly exorcize the spirit of Adam Smith in the field of practical demography. In economic affairs, The Wealth of Nations (1776) popularized the "invisible hand," the idea that an individual who "intends only his own gain," is, as it were, "led by an invisible hand to promote ... the public interest" (5). Adam Smith did not assert that this was invariably true, and perhaps neither did any of his followers. But he contributed to a dominant tendency of thought that has ever since interfered with positive action based on rational analysis, namely, the tendency to assume that decisions reached individually will, in fact, be the best decisions for an entire society. If this assumption is correct it justifies the continuance of our present policy of laissez-faire in reproduction. If it is correct we can assume that men will control their individual fecundity so as to produce the optimum population. If the assumption is not correct, we need to reexamine our individual freedoms to see which ones are defensible.

迈向人口最佳数目,我们要驱逐亚当‧史密的实践人口学的幽灵,才可以取得寸进。「国富论」 (1776) 广为宣扬「无形之手」,这概念即是个人「只是追求自己的利益」,因而「被无形的手指挥,推动…公众利益。」 亚当‧史密没有宣称这是一成不变的真理,甚至他的追随者也没有。但他带动的主导思想趋势自此干扰着基于理性分析的积极性行动。这种趋势就是假定个人决定事实上是整个社会的最佳决定。如果这假定是正确的,现在的自由放任生育政策是有据可依。如果这假定是错误的,我们重新检视种种个人自由,看看那些是可以辩护的。

Tragedy of Freedom in a Commons 公地自由的悲剧
The rebuttal to the invisible hand in population control is to be found in a scenario first sketched in a little-known pamphlet (6) in 1833 by a mathematical amateur named William Forster Lloyd (1794-1852). We may well call it "the tragedy of the commons", using the word "tragedy" as the philosopher Whitehead used it (7): "The essence of dramatic tragedy is not unhappiness. It resides in the solemnity of the remorseless working of things." He then goes on to say, "This inevitableness of destiny can only be illustrated in terms of human life by incidents which in fact involve unhappiness. For it is only by them that the futility of escape can be made evident in the drama."

无形之手控制人口的反驳论点,最先见诸1833年一位业余数学家William Forster Lloyd (1794-1852) 撰写的一本鲜为人知的小册子,可称之为「公地悲剧」;「悲剧」一词借用自哲学家Whitehead :「戏剧性的悲剧要素不是不快乐,而是蕴藏于事物无懊无悔运作的严肃性。」他续后又说:「命运之无可避免,只能以人生不如意事引证,只有这样戏剧才可显现逃避是徒然的。」

The tragedy of the commons develops in this way. Picture a pasture open to all. It is to be expected that each herdsman will try to keep as many cattle as possible on the commons. Such an arrangement may work reasonably satisfactorily for centuries because tribal wars, poaching, and disease keep the numbers of both man and beast well below the carrying capacity of the land. Finally, however, comes the day of reckoning, that is, the day when the long-desired goal of social stability becomes a reality. At this point, the inherent logic of the commons remorselessly generates tragedy.


As a rational being, each herdsman seeks to maximize his gain. Explicitly or implicitly, more or less consciously, he asks, "What is the utility to me of adding one more animal to my herd?" This utility has one negative and one positive component.

作为理性人,每名牛郎追求取得最大得益。或明或暗,有意无意,牛郎抚心自问:「牛群多添一头,对我有什么效益?」 这效应有正、负成份各一。

1) The positive component is a function of the increment of one animal. Since the herdsman receives all the proceeds from the sale of the additional animal, the positive utility is nearly +1.

2) The negative component is a function of the additional overgrazing created by one more animal. Since, however, the effects of overgrazing are shared by all the herdsmen, the negative utility for any particular decision-making herdsman is only a fraction of -1.


(2)负数部份是多一头动物造成的过度放牧的函数。因为过度放牧的效果由全体牛郎承担,所以任何一位牛郎作出决定,负效益只是 -1的小部份。

Adding together the component partial utilities, the rational herdsman concludes that the only sensible course for him to pursue is to add another animal to his herd. And another; and another.... But this is the conclusion reached by each and every rational herdsman sharing a commons. Therein is the tragedy. Each man is locked into a system that compels him to increase his herd without limit--in a world that is limited. Ruin is the destination toward which all men rush, each pursuing his own best interest in a society that believes in the freedom of the commons. Freedom in a commons brings ruin to all.


Some would say that this is a platitude. Would that it were! In a sense, it was learned thousands of years ago, but natural selection favors the forces of psychological denial (8). The individual benefits as an individual from his ability to deny the truth even though society as a whole, of which he is a part, suffers.

有人会认为这是陈腔滥调。这不是吗?某程度上来说,我们几千年前就学会了,但物竞天择偏向于心理否认 。纵使个人也是成员的社会受损,个人会因为取得私利而否认真相。

Education can counteract the natural tendency to do the wrong thing, but the inexorable succession of generations requires that the basis for this knowledge be constantly refreshed.


A simple incident that occurred a few years ago in Leominster, Massachusetts, shows how perishable the knowledge is. During the Christmas shopping season the parking meters downtown were covered with red plastic bags that bore tags reading: "Do not open until after Christmas. Free parking courtesy of the mayor and city council." In other words, facing the prospect of an increased demand for already scarce space, the city fathers reinstituted the system of the commons. (Cynically, we suspect that they gained more votes than they lost by this retrogressive act.)


In an approximate way, the logic of commons has been understood for a long time, perhaps since the discovery of agriculture or the invention of private property in real estate. But it is understood mostly only in special cases which are not sufficiently generalized. Even at this late date, cattlemen leasing national land on the western ranges demonstrate no more than an ambivalent understanding, in constantly pressuring federal authorities to increase the head count to the point where overgrazing produces erosion and weed-dominance. Likewise, the oceans of the world continue to suffer from the survival of the philosophy of the commons. Maritime nations still respond automatically to the shibboleth of the "freedom of the seas." Professing to believe in "the inexhaustible resources of the oceans," they bring species after species of fish and whales closer to extinction (9).


The National Parks present another instance of the working out of the tragedy of the commons. At present, they are open to all, without limit. The parks themselves are limited in extent--there is only one Yosemite Valley--whereas population seems to grow without limit. The values that visitors seek the parks are steadily eroded. Plainly, we must soon cease to treat the parks as commons or they will be of no value anyone.

国家公园是公地悲剧的另一个例子。现今是对外开放,没有限制。公园范围是有限的—只有一个优胜美谷 —但人口增长没有限制。公园访客享乐的价值逐渐减弱。很简单,我们要尽快不要把公园当作公地,否则对任何人都不会有价值。

What shall we do? We have several options. We might sell them off as private property. We might keep them as public property, but allocate the right enter them. The allocation might be on the basis of wealth, by the use of an auction system. It might be on the basis merit, as defined by some agreed-upon standards. It might be by lottery. Or it might be on a first-come, first-served basis, administered to long queues. These, I think, are all the reasonable possibilities. They are all objectionable. But we must choose--or acquiesce in the destruction of the commons that we call our National Parks.


Pollution 污染
In a reverse way, the tragedy of the commons reappears in problems of pollution. Here it is not a question of taking something out of the commons, but of putting something in--sewage, or chemical, radioactive, and heat wastes into water; noxious and dangerous fumes into the air, and distracting and unpleasant advertising signs into the line of sight. The calculations of utility are much the same as before. The rational man finds that his share of the cost of the wastes he discharges into the commons is less than the cost of purifying his wastes before releasing them. Since this is true for everyone, we are locked into a system of "fouling our own nest," so long as we behave only as independent, rational, free-enterprises.


The tragedy of the commons as a food basket is averted by private property, or something formally like it. But the air and waters surrounding us cannot readily be fenced, and so the tragedy of the commons as a cesspool must be prevented by different means, by coercive laws or taxing devices that make it cheaper for the polluter to treat his pollutants than to discharge them untreated. We have not progressed as far with the solution of this problem as we have with the first. Indeed, our particular concept of private property, which deters us from exhausting the positive resources of the earth, favors pollution. The owner of a factory on the bank of a stream--whose property extends to the middle of the stream, often has difficulty seeing why it is not his natural right to muddy the waters flowing past his door. The law, always behind the times, requires elaborate stitching and fitting to adapt it to this newly perceived aspect of the commons.


The pollution problem is a consequence of population. It did not much matter how a lonely American frontiersman disposed of his waste. "Flowing water purifies itself every 10 miles," my grandfather used to say, and the myth was near enough to the truth when he was a boy, for there were not too many people. But as population became denser, the natural chemical and biological recycling processes became overloaded, calling for a redefinition of property rights.


How To Legislate Temperance? 如何为节制立法?
Analysis of the pollution problem as a function of population density uncovers a not generally recognized principle of morality, namely: the morality of an act is a function of the state of the system at the time it is performed (10). Using the commons as a cesspool does not harm the general public under frontier conditions, because there is no public, the same behavior in a metropolis is unbearable. A hundred and fifty years ago a plainsman could kill an American bison, cut out only the tongue for his dinner, and discard the rest of the animal. He was not in any important sense being wasteful. Today, with only a few thousand bison left, we would be appalled at such behavior.

分析污染问题作为人口密度连带产生的事物,带出一项不是普遍了解的道德原则:行动的道德是其进行时体制情况连带产生的事物 。把公地用作污水池,在未开发情况不会危及大众,因为没有大众;在大都市这样做就不能忍受。一百五十年前,平地居民杀死野牛,只割下牛舌头做晚餐,其它的弃掉。他不是浪费。今天只余下几千头野牛,同样的行为会令人惊骇。

In passing, it is worth noting that the morality of an act cannot be determined from a photograph. One does not know whether a man killing an elephant or setting fire to the grassland is harming others until one knows the total system in which his act appears. "One picture is worth a thousand words," said an ancient Chinese; but it may take 10,000 words to validate it. It is as tempting to ecologists as it is to reformers in general to try to persuade others by way of the photographic shortcut. But the essence of an argument cannot be photographed: it must be presented rationally--in words.


That morality is system-sensitive escaped the attention of most codifiers of ethics in the past. "Thou shalt not . . ." is the form of traditional ethical directives which make no allowance for particular circumstances. The laws of our society follow the pattern of ancient ethics, and therefore are poorly suited to governing a complex, crowded, changeable world. Our epicyclic solution is to augment statutory law with administrative law. Since it is practically impossible to spell out all the conditions under which it is safe to burn trash in the back yard or to run an automobile without smog-control, by law we delegate the details to bureaus. The result is administrative law, which is rightly feared for an ancient reason--Quis custodiet ipsos custodes? "Who shall watch the watchers themselves?" John Adams said that we must have a government of laws and not men." Bureau administrators, trying to evaluate the morality of acts in the total system, are singularly liable to corruption, producing a government by men, not laws.

以前编理道德,没有注意到道德是和体系有紧密关系。传统的道德指令形式:「汝不得…」没有顾及特别环境。我们社会的法律依循古老道德的模式,所以大大不适用于复杂,人多和可改变的世界。我们的团团转解决办法是用行政法扩大法定的法律。实际上是不可能列出在后园烧垃圾或是没有烟雾管制开车的全部情况,我国立法把细节下放给官僚。行政法就是这样来的;有一个古老的理由令我们担心——谁来监管监管者?John Adams说过,我们必须有「法治的政府,不是人治。」行政官僚尝试评价处于整个体系的行动的道德,容易变得腐败,贪污;产生人治的政府,不是法治。

Prohibition is easy to legislate (though not necessarily to enforce); but how do we legislate temperance? Experience indicates that it can be accomplished best through the mediation of administrative law. We limit possibilities unnecessarily if we suppose that the sentiment of Quis custodiet denies us the use of administrative law. We should rather retain the phrase as a perpetual reminder of fearful dangers we cannot avoid. The great challenge facing us now is to invent the corrective feedbacks that are needed to keep custodians honest. We must find ways to legitimate the needed authority of both the custodians and the corrective feedbacks.


Freedom To Breed Is Intolerable  自由生育是不能容忍
The tragedy of the commons is involved in population problems in another way. In a world governed solely by the principle of "dog eat dog"--if indeed there ever was such a world--how many children a family had would not be a matter of public concern. Parents who bred too exuberantly would leave fewer descendants, not more, because they would be unable to care adequately for their children. David Lack and others have found that such a negative feedback demonstrably controls the fecundity of birds (11). But men are not birds, and have not acted like them for millenniums, at least.

人口问题在另一方面涉及公地悲剧。在一个由「狗吃狗」原则管治的世界——如果曾经有这样的世界——一个家庭有多少子女不会受公共关注。为人父母生育过多子女,存活的后裔只会少,不会多,因为他们没有能力照顾子女。David Lack和其它人发现这样的负面回馈控制了鸟类的生育力。 但人类不是鸟类,超码在过去几千年都不是如此。

If each human family were dependent only on its own resources; if the children of improvident parents starved to death; if, thus, overbreeding brought its own "punishment" to the germ line--then there would be no public interest in controlling the breeding of families. But our society is deeply committed to the welfare state (12), and hence is confronted with another aspect of the tragedy of the commons.

如果每个人类家庭都是依赖本身的资源;如果眼光短浅父母的子女饥饿致死;如果过度生育为生殖细胞带来自我的「惩罚」—那么管制家庭生育是不涉公共利益。但我们的社会是深深地受福利国家所约束 ,因而面对公地悲剧的另一面。

In a welfare state, how shall we deal with the family, the religion, the race, or the class (or indeed any distinguishable and cohesive group) that adopts overbreeding as a policy to secure its own aggrandizement (13)? To couple the concept of freedom to breed with the belief that everyone born has an equal right to the commons is to lock the world into a tragic course of action.

在一个福利国家,我们如何应付以过度生育来保证扩大本身的家庭,宗教,种族,或阶层(或是任何可以识别和有凝聚力的社群) ?自由生育的概念,连同人人生而平等的信念,足以令世界逃脱不了悲惨的行动。

Unfortunately this is just the course of action that is being pursued by the United Nations. In late 1967, some 30 nations agreed to the following (14): The Universal Declaration of Human Rights describes the family as the natural and fundamental unit of society. It follows that any choice and decision with regard to the size of the family must irrevocably rest with the family itself, and cannot be made by anyone else.


It is painful to have to deny categorically the validity of this right; denying it, one feels as uncomfortable as a resident of Salem, Massachusetts, who denied the reality of witches in the 17th century. At the present time, in liberal quarters, something like a taboo acts to inhibit criticism of the United Nations. There is a feeling that the United Nations is "our last and best hope,'' that we shouldn't find fault with it; we shouldn't play into the hands of the archconservatives. However, let us not forget what Robert Louis Stevenson said: "The truth that is suppressed by friends is the readiest weapon of the enemy." If we love the truth we must openly deny the validity of the Universal Declaration of Human Rights, even though it is promoted by the United Nations. We should also join with Kingsley Davis (15) in attempting to get planned Parenthood-World Population to see the error of its ways in embracing the same tragic ideal.

要明确否定这项权利的合法性是痛苦的;要否定,人们感到不安,正如十七世纪的麻省居民否定女巫存在的现实。现时,自由主义阵营视批评联合国为禁忌,感觉是联合国是「我们最后,最好的希望」,我们不应吹毛求瑕,不要让顽固保守主义者玩弄。但是我们不要忘记Robert Louis Stevenson的话:「朋友禁制的真理,是敌人最灵活的武器。」如果我们深爱真理,我就必须公开否定人权宣言的合法性,虽然这是联合国所推广。我国应当联同Kingsley Davis ,试图改变「计划生育-世界人口组织 」追随同一悲剧性理想的错误。

Conscience Is Self-Eliminating  良知是自我消除
It is a mistake to think that we can control the breeding of mankind in the long run by an appeal to conscience. Charles Galton Darwin made this point when he spoke on the centennial of the publication of his grandfather's great book. The argument is straightforward and Darwinian.

认为长期控制人类生育是诉诸良知,这种想法是错误的。Charles Galton Darwin在他祖父的伟大著作百年纪念发言时,就指出这点。其达尔文式的论点简单直接。

People vary. Confronted with appeals to limit breeding, some people will undoubtedly respond to the plea more than others. Those who have more children will produce a larger fraction of the next generation than those with more susceptible consciences. The difference will be accentuated, generation by generation.


In C. G. Darwin's words: "It may well be that it would take hundreds of generations for the progenitive instinct to develop in this way, but if it should do so, nature would have taken her revenge, and the variety Homo contracipiens would become extinct and would be replaced by the variety Homo progenitivus" (16).

C. G. Darwin如是说:「可能要经历几百世代才发展出这种偏重繁殖的本能;如确实如此,大自然会报复的。避孕人品种会灭绝,被生殖人品种取代。」

The argument assumes that conscience or the desire for children (no matter which) is hereditary--but hereditary only in the most general formal sense. The result will be the same whether the attitude is transmitted through germ-cells, or exosomatically, to use A. J. Lotka's term. (If one denies the latter possibility as well as the former, then what's the point of education?) The argument has here been stated in the context of the population problem, but it applies equally well to any instance in which society appeals to an individual exploiting a commons to restrain himself for the general good--by means of his conscience. To make such an appeal is to set up a selective system that works toward the elimination of conscience from the race.

这论点是假设生儿育女的良知或欲望(无所谓是那一种)是遗传的——所谓遗传是以最一般性的正式意思而言。用J. Lotka的定义来说:无论这态度是经生殖细胞或是体外传播,结果都是一样。(如果否定后者的可能性,也否定前者,那么教育有什么意义?」以上是在人口问题的背景提出这个论点,但这也适用于社会呼吁滥用公地的个人,为了大众利益而抑制自己的任何情况—利用他的良知。利用这样的呼吁,是设立一个最终消除人类良知的选择性机制。

Pathogenic Effects of Conscience  良知的致病效果
The long-term disadvantage of an appeal to conscience should be enough to condemn it; but has serious short-term disadvantages as well. If we ask a man who is exploiting a commons to desist "in the name of conscience," what are we saying to him? What does he hear?--not only at the moment but also in the wee small hours of the night when, half asleep, he remembers not merely the words we used but also the nonverbal communication cues we gave him unawares? Sooner or later, consciously or subconsciously, he senses that he has received two communications, and that they are contradictory: (i) (intended communication) "If you don't do as we ask, we will openly condemn you for not acting like a responsible citizen"; (ii) (the unintended communication) "If you do behave as we ask, we will secretly condemn you for a simpleton who can be shamed into standing aside while the rest of us exploit the commons."


Everyman then is caught in what Bateson has called a "double bind." Bateson and his co-workers have made a plausible case for viewing the double bind as an important causative factor in the genesis of schizophrenia (17). The double bind may not always be so damaging, but it always endangers the mental health of anyone to whom it is applied. "A bad conscience," said Nietzsche, "is a kind of illness."

每个人都陷于Bateson称之为「进退两难的处境」。他和同僚有一个言之成理的说法,认为进退两难是精神分裂症的重要成因。 进退两难,不一定是这样有害,但人若陷于其中,会危及精神健康。尼采如是说:「良心不安,是一种疾病。」

To conjure up a conscience in others is tempting to anyone who wishes to extend his control beyond the legal limits. Leaders at the highest level succumb to this temptation. Has any President during the past generation failed to call on labor unions to moderate voluntarily their demands for higher wages, or to steel companies to honor voluntary guidelines on prices? I can recall none. The rhetoric used on such occasions is designed to produce feelings of guilt in noncooperators.


For centuries it was assumed without proof that guilt was a valuable, perhaps even an indispensable, ingredient of the civilized life. Now, in this post-Freudian world, we doubt it.


Paul Goodman speaks from the modern point of view when he says: "No good has ever come from feeling guilty, neither intelligence, policy, nor compassion. The guilty do not pay attention to the object but only to themselves, and not even to their own interests, which might make sense, but to their anxieties" (18).

Paul Goodman从现代观点来看:「犯罪感从来没有带来好事,无论是智能,政策或热情。犯罪者只关注自己,不会留意犯错的事物,甚至不会留意本身的利益(这可能有意思),只留意本身的焦虑。」

One does not have to be a professional psychiatrist to see the consequences of anxiety. We in the Western world are just emerging from a dreadful two-centuries-long Dark Ages of Eros that was sustained partly by prohibition laws, but perhaps more effectively by the anxiety-generating mechanisms of education. Alex Comfort has told the story well in The Anxiety Makers (19); it is not a pretty one.

我们不需要是专业心理学家才看出焦虑的后果。我们在西方社会中,正从两百年的欲望黑暗年代走出来;这年代部份是由禁制性法律所维系,但可能更为见效的是教育的产生焦虑机制。Alex Comfort在The Anxiety Makers 中描述得很好;这并不是赏心悦目的。

Since proof is difficult, we may even concede that the results of anxiety may sometimes, from certain points of view, be desirable. The larger question we should ask is whether, as a matter of policy, we should ever encourage the use of a technique the tendency (if not the intention) of which is psychologically pathogenic. We hear much talk these days of responsible parenthood; the coupled words are incorporated into the titles of some organizations devoted to birth control. Some people have proposed massive propaganda campaigns to instill responsibility into the nation's (or the world's) breeders. But what is the meaning of the word responsibility in this context? Is it not merely a synonym for the word conscience? When we use the word responsibility in the absence of substantial sanctions are we not trying to browbeat a free man in a commons into acting against his own interest? Responsibility is a verbal counterfeit for a substantial quid pro quo. It is an attempt to get something for nothing.


If the word responsibility is to be used at all, I suggest that it be in the sense Charles Frankel uses it (20). "Responsibility," says this philosopher, "is the product of definite social arrangements." Notice that Frankel calls for social arrangements--not propaganda.

如果我们要用上「责任」,最好是用上Charles Frankel的意思 。这位哲学家说:「责任是有限社会安排的产物。」留意Frankel提出社会安排——不是宣传。

Mutual Coercion Mutually Agreed Upon 彼此同意的彼此强制
The social arrangements that produce responsibility are arrangements that create coercion, of some sort. Consider bank-robbing. The man who takes money from a bank acts as if the bank were a commons. How do we prevent such action? Certainly not by trying to control his behavior solely by a verbal appeal to his sense of responsibility. Rather than rely on propaganda we follow Frankel's lead and insist that a bank is not a commons; we seek the definite social arrangements that will keep it from becoming a commons. That we thereby infringe on the freedom of would-be robbers we neither deny nor regret.


The morality of bank-robbing is particularly easy to understand because we accept complete prohibition of this activity. We are willing to say "Thou shalt not rob banks," without providing for exceptions. But temperance also can be created by coercion. Taxing is a good coercive device. To keep downtown shoppers temperate in their use of parking space we introduce parking meters for short periods, and traffic fines for longer ones. We need not actually forbid a citizen to park as long as he wants to; we need merely make it increasingly expensive for him to do so. Not prohibition, but carefully biased options are what we offer him. A Madison Avenue man might call this persuasion; I prefer the greater candor of the word coercion.


Coercion is a dirty word to most liberals now, but it need not forever be so. As with the four-letter words, its dirtiness can be cleansed away by exposure to the light, by saying it over and over without apology or embarrassment. To many, the word coercion implies arbitrary decisions of distant and irresponsible bureaucrats; but this is not a necessary part of its meaning. The only kind of coercion I recommend is mutual coercion, mutually agreed upon by the majority of the people affected.


To say that we mutually agree to coercion is not to say that we are required to enjoy it, or even to pretend we enjoy it. Who enjoys taxes? We all grumble about them. But we accept compulsory taxes because we recognize that voluntary taxes would favor the conscienceless. We institute and (grumblingly) support taxes and other coercive devices to escape the horror of the commons.


An alternative to the commons need not be perfectly just to be preferable. With real estate and other material goods, the alternative we have chosen is the institution of private property coupled with legal inheritance. Is this system perfectly just? As a genetically trained biologist I deny that it is. It seems to me that, if there are to be differences in individual inheritance, legal possession should be perfectly correlated with biological inheritance--that those who are biologically more fit to be the custodians of property and power should legally inherit more. But genetic recombination continually makes a mockery of the doctrine of "like father, like son" implicit in our laws of legal inheritance. An idiot can inherit millions, and a trust fund can keep his estate intact. We must admit that our legal system of private property plus inheritance is unjust--but we put up with it because we are not convinced, at the moment, that anyone has invented a better system. The alternative of the commons is too horrifying to contemplate. Injustice is preferable to total ruin.


It is one of the peculiarities of the warfare between reform and the status quo that it is thoughtlessly governed by a double standard. Whenever a reform measure is proposed it is often defeated when its opponents triumphantly discover a flaw in it. As Kingsley Davis has pointed out (21), worshippers of the status quo sometimes imply that no reform is possible without unanimous agreement, an implication contrary to historical fact. As nearly as I can make out, automatic rejection of proposed reforms is based on one of two unconscious assumptions: (i) that the status quo is perfect; or (ii) that the choice we face is between reform and no action; if the proposed reform is imperfect, we presumably should take no action at all, while we wait for a perfect proposal.

改革与保持现况的战争,奇特之处之一是被双重标准无意识地管制。当有改革措施提出时,往往因为反对者找到其中瑕疵而落败。正如Kingsley Davis指出 :现况的崇拜者有时暗示没有完全同意的协议,改革是不可能的;这样的暗示违反史实。我尽可能去了解,自动拒绝改革建议是基于两项不自觉的假定:(1)现况是十全十美;或(2)我们面对的选择是改革,或是不采用行动;如果改革建议不是十全十美,我们大概应当不采用行动,等待十全十美的建议。

But we can never do nothing. That which we have done for thousands of years is also action. It also produce evils. Once we are aware that status quo is action, we can then compare its discoverable advantages and disadvantages with the predicted advantages and disadvantages of the proposed reform, discounting as best we can for our lack of experience. On the basis of such a comparison, we can make a rational decision which will not involve the unworkable assumption that only perfect systems are tolerable.


Recognition of Necessity 承认必然力
Perhaps the simplest summary of this analysis of man's population problems is this: the commons, if justifiable at all, is justifiable only under conditions of low-population density. As the human population has increased, the commons has had to be abandoned in one aspect after another. First we abandoned the commons in food gathering, enclosing farm land and restricting pastures and hunting and fishing areas. These restrictions are still not complete throughout the world.


Somewhat later we saw that the commons as a place for waste disposal would also have to be abandoned. Restrictions on the disposal of domestic sewage are widely accepted in the Western world; we are still struggling to close the commons to pollution by automobiles, factories, insecticide sprayers, fertilizing operations, and atomic energy installations.


In a still more embryonic state is our recognition of the evils of the commons in matters of pleasure. There is almost no restriction on the propagation of sound waves in the public medium. The shopping public is assaulted with mindless music, without its consent. Our government is paying out billions of dollars to create supersonic transport which will disturb 50,000 people for every one person who is whisked from coast to coast 3 hours faster. Advertisers muddy the airwaves of radio and television and pollute the view of travelers. We are a long way from outlawing the commons in matters of pleasure. Is this because our Puritan inheritance makes us view pleasure as something of a sin, and pain (that is, the pollution of advertising) as the sign of virtue?


Every new enclosure of the commons involves the infringement of somebody's personal liberty. Infringements made in the distant past are accepted because no contemporary complains of a loss. It is the newly proposed infringements that we vigorously oppose; cries of "rights" and "freedom" fill the air. But what does "freedom" mean? When men mutually agreed to pass laws against robbing, mankind became more free, not less so. Individuals locked into the logic of the commons are free only to bring on universal ruin; once they see the necessity of mutual coercion, they become free to pursue other goals. I believe it was Hegel who said, "Freedom is the recognition of necessity."


The most important aspect of necessity that we must now recognize, is the necessity of abandoning the commons in breeding. No technical solution can rescue us from the misery of overpopulation. Freedom to breed will bring ruin to all. At the moment, to avoid hard decisions many of us are tempted to propagandize for conscience and responsible parenthood. The temptation must be resisted, because an appeal to independently acting consciences selects for the disappearance of all conscience in the long run, and an increase in anxiety in the short.


The only way we can preserve and nurture other and more precious freedoms is by relinquishing the freedom to breed, and that very soon. "Freedom is the recognition of necessity"--and it is the role of education to reveal to all the necessity of abandoning the freedom to breed. Only so, can we put an end to this aspect of the tragedy of the commons.


1. J. B. Wiesner and H. F. York, Sci. Amer. 211 (No. 4). 27 (1964).
2. G. Hardin, J. Hered. 50, 68 (1959); S. von Hoernor, Science 137, 18 (1962).
3. J. von Neumann and O. Morgenstern, Theory of Games and Economic Behavior (Princeton Univ. Press, Princeton, N.J., 1947), p. 11.
4. J. H. Fremlin. New Sci., No. 415 (1964), p. 285.
5. A. Smith, The Wealth of Nations (Modern Library, New York, 1937), p. 423.
6. W. F. Lloyd, Two Lectures on the Checks to Population (Oxford Univ. Press, Oxford, England, 1833), reprinted (in part) in Population, Evolution, and Birth Control, G. Hardin. Ed. (Freeman, San Francisco, 1964), p. 37.
7. A. N. Whitehead, Science and the Modern World (Mentor, New York, 1948), p. 17.
8. G. Hardin, Ed. Population, Evolution. and Birth Control (Freeman, San Francisco, 1964). p. 56.
9. S. McVay, Sci. Amer. 216 (No. 8), 13 (1966).
10. J. Fletcher, Situation Ethics (Westminster, Philadelphia, 1966).
11. D. Lack, The Natural Regulation of Animal Numbers (Clarendon Press, Oxford, 1954).
12. H. Girvetz, From Wealth to Welfare (Stanford Univ. Press. Stanford, Calif., 1950).
13. G. Hardin, Perspec. Biol. Med. 6, 366 (1963).
14. U. Thant, Int. Planned Parenthood News, No.168 (February 1968), p. 3.
15. K. Davis, Science 158, 730 (1967).
16. S. Tax, Ed., Evolution after Darwin (Univ. of Chicago Press, Chicago, 1960), vol. 2, p. 469.
17. G. Bateson, D. D. Jackson, J. Haley, J. Weakland, Behav. Sci. 1. 251 (1956).
18. P. Goodman, New York Rev. Books 10(8), 22 (23 May 1968).
19. A. Comfort, The Anxiety Makers (Nelson, London, 1967).
20. C. Frankel, The Case for Modern Man (Harper, New York, 1955), p. 203.
21. J. D. Roslansky, Genetics and the Future of Man (Appleton-Century-Crofts, New York, 1966). p. 177.


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