This paper is concerned with reasonings that purport to explain why certain organisms have certain traits by showing that their actual design is better than contrasting designs. Biologists call such reasonings 'functional explanations'. To avoid confusion with other uses of that phrase, I call them 'design explanations'. This paper discusses the structure of design explanations and how they contribute to scientific understanding. Design explanations are contrastive and often compare real organisms to hypothetical organisms that cannot possibly exist. They are not (...) causal but appeal to functional dependencies between an organism's different traits. These explanations point out that because an organism has certain traits, it cannot be alive if the trait to be explained were replaced by a specified alternative. They can be understood from a mechanistic point of view as revealing the constraints on what mechanisms can be alive. (shrink)

Les critiques actuelles des diagnostics psychiatriques, qu’elles viennent des antipsychiatres, des béhavioristes, des constructionnistes sociaux, des szasziens et des foucaldiens, rejettent généralement l’idée que le concept de trouble mental est légitime du point de vue médical, ne laissant donc aucun argument solide à partir duquel il soit possible de mener une critique constructive et d’établir un dialogue avec la psychiatrie. Ces positions ne réussissent également pas à expliquer les fortes intuitions populaires qui permettent aux gens de distinguer les troubles psychologiques (...) des autres conditions psychologiques négatives. Selon l’analyse de la dysfonction préjudiciable présentée dans cet article, un trouble mental est une condition : 1) préjudiciable, un concept évaluatif basé sur des valeurs sociales ; et 2) causée par une dysfonction psychologique, un concept factuel se rapportant à un mécanisme psychologique qui accomplit une fonction pour laquelle il a été biologiquement conçu . L’analyse DP est ainsi une position hybride qui requiert à la fois que des critères évaluatifs et factuels soient satisfaits pour garantir l’attribution d’un trouble. Nous argumentons que l’analyse DP réussit admirablement à expliquer les jugements intuitifs quant à ce qui est un trouble et à ce qui en n’est pas. La composante factuelle permet également de critiquer le critère diagnostique du DSM, ce que nous ferons à l’aide de plusieurs exemples . Ces critiques déterminent où le DSM a dévié de ses propres hypothèses et ainsi considéré comme des troubles ce qui n’en est pas. Elles expliquent également pourquoi les tentatives du DSM de remédier au problème en introduisant le critère du « cliniquement significatif » échouent.Current antipsychiatric, behaviorist, social-constructivist, Szaszian, and Foucauldian critiques of psychiatric diagnosis generally reject mental disorder as a medically legitimate concept, thus allowing no place to stand from which to mount a constructive critique and dialogue with psychiatry. These views also fail to explain the robust folk intuitions by which people distinguish psychological disorders from other negative psychological conditions. According to the harmful dysfunction analysis presented in this paper, a mental disorder is condition that is harmful, a value concept judged by social values ; and caused by a psychological dysfunction, a factual concept referring to failure of a psychological mechanism to perform a function for which it is biologically designed . The HD analysis is thus a hybrid account that requires both value and factual criteria to be satisfied before attribution of disorder is warranted. It is argued that the HD analysis has considerable success in explaining intuitive judgments about disorder versus non-disorder. The factual component also allows for a critique of DSM diagnostic criteria for specific categories, with several examples discussed. These critiques identify where the DSM has deviated from its own deepest assumptions and labeled non-disorders as disorders, and why the DSM’s own attempts to fix the problem, as with the «clinical significance» criterion, do not succeed. (shrink)

Many think that evolutionary biology has relevance to ethics, but how far that relevance extends is a matter of debate. It is easy to show that pop sociobiological approaches to ethics all commit some type of naturalistic fallacy. More sophisticated attempts, like Donald Campbell's, or, more recently, Robert Richards', are not so easily refuted, but I will show that they too reason fallaciously from facts to values. What remains is the possibility of an evolutionary search for human nature. Unfortunately, evolutionary (...) theory itself seems to imply that the quest for human nature will not be very promising. As far as there is such a thing as human nature, we will have to know it before we can meaningfully talk about its evolution. Anthropological data suggest that we differ widely in our normative judgments. And even where we seem to agree, there is good reason to doubt that we really do so. (shrink)

Recent interest in the social and ethical aspects of biology raises the question of the disciplinary status of the study of these aspects of biology . In the traditional interpretations of theoretical biology the social and ethical aspects are usually not explicitly mentioned. In this article arguments are given for inclusion of the study of these aspects of biology within a broadened conception of theoretical biology.

Something is wrong with current discussions about theory reduction. The question of whether higher level theories are reducible to lower level theories cannot be posed in a sensible way if methodological principles that are needed to evaluate scientific theories are disregarded. If this is recognized, the problem looses much of its alleged importance.

La littérature épistémologique actuelle véhicule une image caricaturale de la philosophie popperienne de la biologie. En effet, on suppose sa position suffisamment claire et univoque pour pouvoir se résumer succinctement en quelques lignes. De plus, on la suppose toujours la même tout au long de l'évolution intellectuelle de son auteur. Dans le présent article, nous voudrions contester ces deux suppositions car sa pensée est non seulement vague et ambiguë mais encore elle est loin d'être constante et homogène. De ce fait, (...) nous entendons corriger une conception eronnée et généralement répandue de sa philosophie de la biologie.Popper's philosophy of biology is generally miscon- ceived. It is supposed to be homogeneous and clearly statable in a few lines. Worse, Popper's changes of mind on these questions are not even taken into account. In this article, we will try to show why these suppositions are erroneous and how they hinder us from forming a more adequate idea of his philosophy of biology. (shrink)

Revaluation of the problem of natural teleology seems an important precondition for elucidating our environmental crisis and for formulating an 'econological ethics', because it calls for a recognition of an intrinsic value in nature and organisms. Therefore, it is necessary to show that the concept of natural teleology is not in contradiction with scientific theories, in particular not with the theory of evolution. In this paper I shall argue that there is a fundamental misunderstanding about the concepts of teleology and (...) chance in modern thinking. This as a result of a radical transformation of the Aristotelian concept of teleology by Christian theologians during the Middle Ages. This confusion resulted in the rejection of teleology from evolution and in an exaggeration of the role of chance. However, not a solution for the problem of teleology is given here, but only an attempt to prove that neither the fossil-record, nor the role of chance in evolution can give adequate arguments for the negation of teleology in evolution. That is not to say that, therefore there exists teleology in evolution, but the problem of teleology in nature cannot, be solved by the scientific theory of evolution, but only be elucidated by philosophical analysis. At the end of the paper it is argued that teleology must be rather presupposed in evolution. (shrink)

Michael Scriven’s (1959) example of identical twins (who are said to be equal in fitness but unequal in their reproductive success) has been used by many philosophers of biology to discuss how fitness should be defined, how selection should be distinguished from drift, and how the environment in which a selection process occurs should be conceptualized. Here it is argued that evolutionary theory has no commitment, one way or the other, as to whether the twins are equally fit. This is (...) because the theory of natural selection is fundamentally about the fitnesses of traits, not the fitnesses of token individuals. A plausible philosophical thesis about supervenience entails that the twins are equally fit if they live in identical environments, but evolutionary biology is not committed to the thesis that the twins live in identical environments. Evolutionary theory is right to focus on traits, rather than on token individuals, because the fitnesses of token organisms (as opposed to their actual survivorship and degree of reproductive success) are almost always unknowable. This point has ramifications for the question of how Darwin’s theory of evolution and R. A. Fisher’s are conceptually different. (shrink)

In this paper I propose to examine, and in part revive, a time-honoured perspective to inquiry in general and scientific explanation in particular. The perspective is to view inquiry as a search for answers to questions. If there is anything that deserves to be called a working scientist's view of his or her daily work, it surely is that he or she phrases questions and attempts to find satisfactory answers to them.

The beginning of any rigorous interdisciplinary study, as Hegel and later Marx predicted, is going to be the occasion for opposition, contradiction, negation and mediation. Sociobiology is not a mature field (thesis). Kitcher's critical work entitledVaulting Ambition seeks to at once expose the failings of this field (serving as antithesis) while simultaneously defining the requirements for more mature, and thus epistemologically satisfying, sociobiological explanations (synthesis). The sociobiological research agenda is thus implicitly given a green light provided certain methodological precautions are (...) taken into consideration. Confucius believed that under these circumstances the only way to restore order would be so to arrange affairs that the Emperor would continue to be Emperor, the nobles to be nobles, the ministers to be ministers, and the common people common people. That is, the actual must in each case be made to correspond to the name. This theory Confucius called theRectification of Names (cheng ming), a doctrine which he recognized as being of the utmost importance. (Fung, 1952, p. 59). Tzu-lu said, “If the Lord of Wei left the adminstration (cheng) of his state to you, what would you put first?” The Master said, “If something has to be put first, it is, perhaps, the rectification (cheng) of names.” (The Analects (Lun yü) of Confucius, Book XIII: 3) (Besides being homophones, the two words in Chinese are cognate, thus showing that the concept of ‘governing’ was felt to be related to that of ‘correcting’.) . (shrink)

Function and teleology can be naturalized either by reference to systems with a particular type of organization or by reference to a particular kind of history. As functions are generally ascribed to states or traits according to their current role and regardless of their origin, etiological accounts are inappropriate. Here, I offer a systems-theoretical interpretation as a new version of an organizational account of functionality, which is more comprehensive than traditional cybernetic views and provides explicit criteria for empirically testable function (...) ascriptions. I propose, that functional states, traits or items are those components of a complex system, which are under certain circumstances necessary for their self-re-production. I show, how this notion can be applied in intra- and trans-generational function ascriptions in biology, how it can deal with the problems of multifunctionality and functional equivalents, and how it relates to concepts like fitness and adaptation. Finally, I argue that most intentional explanations can be treated as functional explanations. (shrink)

Our primary goal in this article is to discuss the cross-talk between biological and cultural factors that become manifested in the individual brain development, neural wiring, neurochemical homeostasis, and behavior. We will show that behavioral propensities are the product of both cultural and biological factors and an understanding of these interactive processes can provide deep insights into why people behave the way they do. This interdisciplinary perspective is offered in an effort to generate dialog and empirical work among scholars interested (...) in merging aspects of anthropology and neuroscience, and anticipates that biological and cultural anthropology converge. We discuss new theoretical developments, hypothesis-testing strategies, and cross-disciplinary methods of observation and data collection. We believe that the exigency of integrating anthropology and the neurosciences is indisputable and anthropology's role in an emerging interdisciplinary science of human behavior will be critical because its focus is, and has always been, on human biological and cultural systems. (shrink)

My book, "The Darwinian Revolution" gives an overview of the revolution as understood at the time of its writing (1979). It shows that many factors were involved, from straight science through philosophical methodology, and on to religious influences and challenges. Also of importance were social factors, not the least of which was the professionalization of science in Britain in the 19th century. Since the appearance of that book, new, significant factors have become apparent, and here I discuss some of the (...) most important -- especially the way in which evolution as an idea came into being as an epiphenomenon of the ideology of cultural progress; the (often tense) interaction between ideas of biological progress and the urge to professionalization, and of how this led to a delay in the full appreciation of what Charles Darwin had done in the "Origin;" and the ongoing divide between biological functionalists and biological formalists, a Kuhnian-type paradigm difference that persists across the Darwinian revolution. (shrink)

Ernan McMullin's 1982 presidential address to the Philosophy of Science Association dealt with the issue of science and values, arguing that although scientists are rightfully wary of the infiltration of cultural and social values, their work is guided by “epistemic values,” such as the drive for consistency and predictive fertility. McMullin argued that it is the pursuit of these epistemic values that drives nonepistemic values from science. Using the case study of the fate of the nonepistemic value of progress in (...) the history of evolutionary theorizing, I show that, vital though McMullin's thinking was for my own scholarship, in fact the study shows that the connections between epistemic and nonepistemic values in science are more complex than either of us supposed. (shrink)

Through autobiography, I explain why I cannot accept conventional Christianity or any other form of religious belief. I sketch how, through modern evolutionary theory, I try to find an alternative world‐picture, one which is, however, essentially agnostic about ultimate meanings. I characterize my position as being that of “David Hume brought up‐to‐date by Charles Darwin.” I express sad skepticism about ever realizing the hopes on which Zygon was founded.

Francis Collins, the director of the NEH and well-known Christian, has said that agnosticism is a bit of a cop-out. Either be a Christian or be an atheism, but have the guts to make up your mind. I shall argue in a positive way for agnosticism, showing that it can be as vibrant a position as belief or non-belief. It gives you a renewed appreciation of life and the world in which we live.

The Evolutionary Synthesis is often seen as a unification process in evolutionary biology, one which provided this research area with a solid common theoretical foundation. As such, neo-Darwinism is believed to constitute from this time onward a single, coherent, and unified movement offering research guidelines for investigations. While this may be true if evolutionary biology is solely understood as centred around evolutionary mechanisms, an entirely different picture emerges once other aspects of the founding neo-Darwinists’ views are taken into consideration, aspects (...) potentially relevant to the elaboration of an evolutionary worldview: the tree of life, the ontological distinctions of the main cosmic entities , the inherent properties of self-organizing matter, evolutionary ethics, and so on. Profound tensions and inconsistencies are immediately revealed in the neo-Darwinian movement once this broader perspective is adopted. This pluralism is such that it is possible to identify at least three distinct and quasi-incommensurable epistemological/metaphysical frameworks as providing a proper foundation for neo-Darwinism. The analysis of the views of Theodosius Dobzhansky, Bernhard Rensch, and Ernst Mayr will illustrate this untenable pluralism, one which requires us to conceive of the neo-Darwinian research agenda as being conducted in more than one research programme or research tradition at the same time. (shrink)

It is often argued that biological generalizations have a distinctive and special status by comparison with the generalizations of other natural sciences, such as that biological generalizations are riddled with exceptions defying systematic and simple treatment. This special status of biology is used as a premise in arguments that posit a deprived explanatory, nomological, or methodological status in the biological sciences. I will discuss the traditional and still almost universally held idea that the biological sciences cannot deal with exceptions and (...) application conditions of their generalizations with their own distinctive and proprietary explanantia, but need the help of lower-level sciences to carry out this task. The idea of lower-level explanations of exceptions is connected to the idea that the biological sciences need lower-level sciences to better themselves and to the idea that biological sciences cannot provide reliable and extrapolatable results or explanations by themselves. I present counterexamples to the idea of lower-level explanations of exceptions in biology. I also discuss and refute more general arguments why the idea of lower-level explanations of exceptions has been held to hold in the special sciences, such as the screening-off and openness arguments. This suggest that there might be nothing special about the biological sciences vis-à-vis the more fundamental natural sciences, such as physics insofar as explanations of exceptions are concerned, and that the biological sciences can provide reliable and extrapolatable results or explanations by themselves. (shrink)