Abstract

What I suggest we can see in this brief overview of the literature is an extensive interpenetration on both sides of these debates between scientific, political, and social values. Important shifts in political and social values were of course occurring over the same period, some of them in parallel with, and perhaps even contributing to, these transitions I have been speaking of in evolutionary discourse. The developments that I think of as at least suggestive of possible parallels include the progressive encroachment of public values into the private domain of post-World War II American life, the cold war, the rise of consumerism, and the flowering of what Christopher Lasch calls a “narcissistic individualism.”35 In popular language, the 1960s gave birth to the “me” generation. Perhaps the most tantalizing analogue is suggested by Barbara Ehrenreich's argument for the emergence of a new meaning of masculinity — an ideal of masculinity measured not by commitment, responsibility, or success as family provider, but precisely by the strength of a man's autonomy in the private sphere, his resistance to the demands of a hampering female.36 It is tempting to speculate about possible connections between changes in scientific discourse and developments in the social and political spheres, but such connections, however suggestive, would clearly have to be demonstrated.For now, however, I want to focus on another kind of change —a transformation not so much in the social or political sphere as in the scientific sphere. I make this turn, or return, in support of a more complex account of scientific change that incorporates reverberations within the scientific communty along with social and political changes.In the 1960s, all of biology was undergoing a major transformation in direct response to the dramatic successes of molecular biology. These successes seemed to completely vindicate the values on which the molecular revolution was premised — namely, simplicity and mechanism. Following the victory of Watson and Crick, and of others after them, the fever of that endeavor swept through biology leaving in its wake a new standard of science, and of scientific discourse — one predicated on clarity, simplicity, and analyzability; on the definition of legitimate questions as those capable of clear and unambiguous answers. Every biological discipline felt it — even evolutionary biology, which in some respects was at the furthest pole. Perhaps precisely because it seemed conceptually so remote, evolutionary biology may have felt it most of all. Lewontin inadvertently provides us with some direct support for this view. Indeed, he begins his introduction to Population Biology and Evolution with the following remarks: The twenty years since World War II have seen a vindication in biology of our faith in the Cartesian method as a way of doing science. Some of the most fundamental and interesting problems of biology have been solved or are very nearly solved by an analytic technique that is now loosely called “molecular biology.” But it is not specifically the “molecular” aspect of biology of the last twenty years that has led to its success. It is, rather, the analytic aspect, the belief that by breaking systems down into their component parts, by simplifying them or using simpler organisms, one can learn about more complex systems. As it happens, the problems that were attacked and are being attacked by this method lead to answers in terms of molecules and cell organelles.... There is a host of problems in biology, however, that has been much neglected in these twenty exciting years, because the answers to them cannot be meaningfully framed in molecular and cellular terms.37Lewontin is referring, of course, to problems in evolution. The remainder of his remarks is devoted to an argument for the applicability of the method, if not the content, of molecular biology to these problems. He writes, “It is not the case that molecular biology is Cartesian and analytic while population biology is holistic. Population biology is properly analytic and operates, within the framework of its own problems, by the process of simplification, analysis, and resynthesis.”38 With these remarks, he leads into the criticism of the “holists” who have “held up progress.”This new ethic of simplicity, clarity, and mechanism — embodying the very virtues lauded by Williams — was explicitly carried into evolutionary biology in the name of scientific progress. As it happened, the values implied also fit conveniently well with other values — each set of values providing crucial support for the other.However substantive the scientific gains may have been in some respects, the net effect of this ethic has also been a systematic “perceptual bias” — a bias with profound practical consequences for the entire program of methodological individualism in evolutionary biology, if not elsewhere as well. It may well be that the whole is equivalent to the reconstituted aggregate of its parts, if, in the process of aggregation or summation, all possible interactions among the parts are included. But if certain kinds of interactions are systematically excluded, our confidence in that program necessarily founders. My claim here is that such systematic exclusion does occur, and that it occurs on a number of different levels. To briefly review the interlocking kinds of “bias” that I see occurring in practice, I suggest the following schematic listing:On the most general level: The ethic of simplicity — the privileging of certain values, even certain methodologies, as having an a priori superior claim to scientific credibility.Only slightly less general, and crucially related, is the equation of “scientific” with “tractible”: Given the techniques of analysis available, the equation of science with what we can do inevitably leads to a systematic technical bias favoring simplicity. That is, because we don't know how to model complex dynamics, nonlinear interactions are systematically biased against because of the limitations of our technical know-how. The consequences of this equation of the scientific with the tractible are greatly compounded by the additional equation between what we can do and what is — that is, by our temptation to confuse tractibility with reality.Finally, and also closely related, a further kind of elision occurs even within the confines of tractibility. This kind of elision — taking the form almost of inferring tractibility from one's prior assumptions of what is real — is exemplified by the history of a mathematical ecology of mutualism. Even when mutualism can be introduced into the same technical machinery, it is still not pursued. The basic assumption is that competition is what is real, not because it is easier to model, but because it is what we expect. When the actual difficulties of modeling competition are then in turn suppressed, as in the Robert May story, what we have, given the temptation to equate the tractible with the real, is the possibility of a truly self-fulfilling prophecy