Evolutionary theory predicts that humans should avoid incest because of the negative effects incest has on individual reproduction: production of defective offspring. Selection for the avoidance of close-kin mating has apparently resulted in a psychological mechanism that promotes voluntary incest avoidance. Most human societies are thought to have rules regulating incest. If incest is avoided, why are social rules constructed to regulate it? This target article suggests that incest rules do not exist primarily to regulate close-kin mating but to regulate (...) inbreeding between more distant kin and sexual relations between affinal relatives. Three evolutionary hypotheses about cousin marriage and affinal kin mating follow from this suggestion: Rules regulating mating between affinal kin are means of paternity protection. Cousin marriage is regulated because, if it occurs, it can concentrate wealth and power within families to the detriment of the powerful positions of rulers in stratified societies and the relatively equal social statuses of most men in egalitarian societies. Tests using the comparative method on a worldwide sample of 129 societies supported the three hypotheses. Two alternative anthropological hypotheses failed to be supported. (shrink)

Contemporary mate preferences can provide important clues to human reproductive history. Little is known about which characteristics people value in potential mates. Five predictions were made about sex differences in human mate preferences based on evolutionary conceptions of parental investment, sexual selection, human reproductive capacity, and sexual asymmetries regarding certainty of paternity versus maternity. The predictions centered on how each sex valued earning capacity, ambition— industriousness, youth, physical attractiveness, and chastity. Predictions were tested in data from 37 samples drawn from (...) 33 countries located on six continents and five islands. For 27 countries, demographic data on actual age at marriage provided a validity check on questionnaire data. Females were found to value cues toresource acquisitionin potential mates more highly than males. Characteristics signalingreproductive capacitywere valued more by males than by females. These sex differences may reflect different evolutionary selection pressures on human males and females; they provide powerful cross-cultural evidence of current sex differences in reproductive strategies. Discussion focuses on proximate mechanisms underlying mate preferences, consequences for human intrasexual competition, and the limitations of this study. (shrink)

continue to have armies, as I suspect we will for some time to come, then they, too, must be fully integrated, as well as our national guard, our state troopers, our local sheriffs' offices, our district attorneys' offices, our state prosecuting attorneys'  ...

Despite wide acceptance that the attributes of living creatures have appeared through a cumulative evolutionary process guided chiefly by natural selection, many human activities have seemed analytically inaccessible through such an approach. Prominent evolutionary biologists, for example, have described morality as contrary to the direction of biological evolution, and moral philosophers rarely regard evolution as relevant to their discussions. -/- The Biology of Moral Systems adopts the position that moral questions arise out of conflicts of interest, and that moral systems (...) are ways of using confluences of interest at lower levels of social organiation to deal with conflicts of interest at higher levels. Moral systems are described as systems of indirect reciprocity: humans gain and lose socially and reproductively not only by direct transactions, but also by the reputations they gain from the everyday flow of social interactions. -/- The author develops a general theory of human interests, using senescence and effort theory from biology, to help analye the patterning of human lifetimes. He argues that the ultimate interests of humans are reproductive, and that the concept of morality has arisen within groups because of its contribution to unity in the context, ultimately, of success in intergroup competition. He contends that morality is not easily relatable to universals, and he carries this argument into a discussion of what he calls the greatest of all moral problems, the nuclear arms race. (shrink)

This paper presents and criticizes. Alexander's evolutionary theory of morality (1987). Earlier research, on which Alexander's theory is based, is also reviewed. The propensity to create moral systems evolved because it allowed ancestral humans to limit conflict within cooperating groups and thus form larger groups, which were advantageous because of intense between-group competition. Alexander sees moral codes as contractual, and the primary criticism of his theory is that moral codes are not completely contractual but also coercive. Ways of evaluating Alexander's (...) theory as well as modified versions of it are discussed. (shrink)

Controversies about optimality models and adaptationist methodologies have animated the discussions of evolutionary theory in recent years. The sociobiologists, following the lead of E. O. Wilson, have argued that if Darwinian natural selection can be reliably expected to produce the best possible type of organism - one that optimizes the value of its genetic contribution to future generations - then evolution becomes a powerfully predictive theory as well as an explanatory one. The enthusiastic claims of the sociobiologists for the predictability (...) and applicability that the optimalist approach engenders have been met with severe criticism by Richard C. Lewontin, Stephen Jay Gould, and other biologists and philosophers of biology. These original essays take up both sides of the controversy over the role of optimality models in evolutionary biology, providing a refreshingly insightful and balanced discussion of optimality issues by an interdisciplinary group of leading philosophers of biology, biologists, psychologists, anthropologists, and an economist. They focus on the current state of adaptationist and optimalist methodology in evolutionary theory, and on the possibility of extending such methodology to the human sciences, especially those of psychology and anthropology. Introduction / John Dupre -- Part 1. Methodological questions. Simple models of complex phenomena: the case of cultural evolution / Peter J. Richerson and Robert Boyd -- Natural selection and the null hypothesis / John Beatty -- Why not the best? / Philip Kitcher -- Part 2. Evolution and optimality. What is adaptationism? / Elliot Sober -- How to model evolution / John Maynard Smith -- Comments on Maynard Smith’s "How to Model Evolution" / Elliot Sober -- Reply to Sober / John Maynard Smith -- The shape of optimality / Richard C. Lewontin -- Part 3. Applications. Evolutionary ecology and the optimality assumption / John M. Emlen -- Optimality theory and behavior / John E.R. Staddon -- Part 4. Applications to human behavior. Optimization theory in anthropology: applications and critiques / Eric Alden Smith -- Evolution of a mesh between principles of the mind and regularities of the world / Roger N. Shepard -- From evolution to behavior: evolutionary psychology as the missing link / Leda Cosmides and John Tooby -- On the emotions as guarantors of threats and promises / Jack Hirschleifer -- Human kinds / John Dupre. (shrink)

Three eminent scientists analyze the scientific, social, and political roots of biological determinism.

By carefully examining the biological, genetic, evolutionary, and psychological evidence, a noted biologist finds a shocking lack of substance behind ideas about biologically based sex differences. Features a new chapter and afterward on recent biological breakthroughs.

Book reviewed in this article: Not In Our Genes: Biology, Ideology, and Human Nature. By R. C. Lewontin, Steven Rose, and Leon J. Kamin.

Evolutionary biology and feminism share a variety of philosophical and practical concerns. I have tried to describe how a perspective from both evolutionary biology and feminism can accelerate the achievement of goals for both feminists and evolutionary biologists. In an early section of this paper I discuss the importance of variation to the disciplines of evolutionary biology and feminism. In the section entitled “Control of Female Reproduction” I demonstrate how insight provided by participation in life as woman and also as (...) a feminist suggests testable hypotheses about the evolution of social behavior—hypotheses that are applicable to our investigations of the evolution of social behavior in nonhuman animals. In the section on “Deceit, Self-deception, and Patriarchal Reversals” I have overtly conceded that evolutionary biology, a scientific discipline, also represents a human cultural practice that, like other human cultural practices, may in parts and at times be characterized by deceit and self-deception. In the section on “Femininity” I have indicated how questions cast and answered and hypotheses tested from an evolutionary perspective can serve women and men struggling with sexist oppression. (shrink)

1. Some Women That Never Evolved 2. An Initial Inequality 3. Monogamous Primates: A Special Case 4. A Climate for Dominant Females 5. The Pros and Cons of Males 6. Competition and Bonding among Females 7. The Primate Origins of Female Sexuality 8. A Disputed Legacy.

Male aggression against females in primates, including humans, often functions to control female sexuality to the male’s reproductive advantage. A comparative, evolutionary perspective is used to generate several hypotheses to help to explain cross-cultural variation in the frequency of male aggression against women. Variables considered include protection of women by kin, male-male alliances and male strategies for guarding mates and obtaining adulterous matings, and male resource control. The relationships between male aggression against women and gender ideologies, male domination of women, (...) and female sexuality are also considered. (shrink)

Two books have been particularly influential in contemporary philosophy of science: Karl R. Popper's Logic of Scientific Discovery, and Thomas S. Kuhn's Structure of Scientific Revolutions. Both agree upon the importance of revolutions in science, but differ about the role of criticism in science's revolutionary growth. This volume arose out of a symposium on Kuhn's work, with Popper in the chair, at an international colloquium held in London in 1965. The book begins with Kuhn's statement of his position followed by (...) seven essays offering criticism and analysis, and finally by Kuhn's reply. The book will interest senior undergraduates and graduate students of the philosophy and history of science, as well as professional philosophers, philosophically inclined scientists, and some psychologists and sociologists. (shrink)