This paper investigates hypotheses drawn from two sources: (1) Belsky, Steinberg, and Draper’s (1991) attachment theory model of the development of reproductive strategies, and (2) recent life history models and comparative data suggesting that environmental risk and uncertainty may be potent determinants of the optimal tradeoff between current and future reproduction. A retrospective, self-report study of 136 American university women aged 19–25 showed that current recollections of early stress (environmental risk and uncertainty) were related to individual differences in adult time (...) preference and adult sexual behavior, and that individual differences in time preference were related to adult attachment organization and sexual behavior. These results are consistent with the hypothesis that perceptions of early stress index environmental risk and uncertainty and mediate the attachment process and the development of reproductive strategies. On this view individual differences in time preference are considered to be part of the attachment theoretical construct of an internal working model, which itself is conceived as an evolved algorithm for the contingent development of alternative reproductive strategies. (shrink)

Females' tendency to place a high value on protecting their own lives enhanced their reproductive success in the environment of evolutionary adaptation because infant survival depended more upon maternal than on paternal care and defence. The evolved mechanism by which the costs of aggression (and other forms of risk taking) are weighted more heavily for females may be a lower threshold for fear in situations which pose a direct threat of bodily injury. Females' concern with personal survival also has implications (...) for sex differences in dominance hierarchies because the risks associated with hierarchy formation in nonbonded exogamous females are not offset by increased reproductive success. Hence among females, disputes do not carry implications for status with them as they do among males, but are chiefly connected with the acquisition and defence of scarce resources. Consequently, female competition is more likely to take the form of indirect aggression or low-level direct combat than among males. Under patriarchy, men have held the power to propagate images and attributions which are favourable to the continuance of their control. Women's aggression has been viewed as a gender-incongruent aberration or dismissed as evidence of irrationality. These cultural interpretations have evolutionarily based sex differences by a process of imposition which stigmatises the expression of aggression by females and causes women to offer exculpatory (rather than justificatory) accounts of their own aggression. (shrink)

It is hypothesized from within an evolutionary framework that females should be less invested in peer relations than males. Investment was operationalized as enjoyment in Study 1 and as preference for interaction in Study 2. In the first study, four- and six-year-old children’s enjoyment of peer interaction was observed in 26 groups of same-sex peers. Girls were rated as enjoying their interactions significantly less than boys. In the second study, six- and nine-year-old children were interviewed about the individuals with whom (...) they spend time in their homes and neighborhoods and about the individuals who participate in their favorite activities. The proportion of individuals named by children who were peers was significantly lower for girls than boys both in children’s neighborhoods and in children’s favorite activities. Results strongly support the hypothesis that females and males have evolved differential preferences for interaction with peers. (shrink)

ORIGIN OF SPECIES. INTRODUCTION. When on board HMS 'Beagle,' as naturalist, I was ranch struck with certain facts in the distribution of the organic beings ...

... Difficulty of distinguishing between Varieties and Species — Origin of Domestic ... and Origin— Principle of Selection anciently followed, its Effects— ...

Acknowledgments 1. Culture Is Essential 2. Culture Exists 3. Culture Evolves 4. Culture Is an Adaptation 5. Culture Is Maladaptive 6. Culture and Genes Coevolve 7. Nothing about Culture Makes Sense except in the Light of Evolution.

This article argues that feminist analyses of patriarchy should be expanded to address the evolutionary basis of male motivation to control female sexuality. Evidence from other primates of male sexual coercion and female resistance to it indicates that the sexual conflicts of interest that underlie patriarchy predate the emergence of the human species. Humans, however, exhibit more extensive male dominance and male control of female sexuality than is shown by most other primates. Six hypotheses are proposed to explain how, over (...) the course of human evolution, this unusual degree of gender inequality came about. This approach emphasizes behavioral flexibility, cross-cultural variability in the degree of partriarchy, and possibilities for future change. (shrink)

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)

Sex differences in mortality rates stem from genetic, physiological, behavioral, and social causes that are best understood when integrated in an evolutionary life history framework. This paper investigates the Male-to-Female Mortality Ratio (M:F MR) from external and internal causes and across contexts to illustrate how sex differences shaped by sexual selection interact with the environment to yield a pattern with some consistency, but also with expected variations due to socioeconomic and other factors.

Rape of women by men might be generated either by a specialized rape adaptation or as a by-product of other psychological adaptations. Although increasing number of sexual partners is a proposed benefit of rape according to the “rape as an adaptation” and the “rape as a by-product” hypotheses, neither hypothesis addresses directly why some men rape their long-term partners, to whom they already have sexual access. In two studies we tested specific hypotheses derived from the general hypothesis that sexual coercion (...) in the context of an intimate relationship may function as a sperm competition tactic. We hypothesized that men’s sexual coercion in the context of an intimate relationship is related positively to his partner’s perceived infidelities and that men’s sexual coercion is related positively to their mate retention behaviors (behaviors designed to prevent a partner’s infidelity). The results from Study 1 (self-reports from 246 men) and Study 2 (partner-reports from 276 women) supported the hypotheses. The Discussion section addresses limitations of this research and highlights future directions for research on sexual coercion in intimate relationships. (shrink)

This provocative text considers whether evolutionary explanations can be used to clarify some of life’s biggest questions. Examines topics of race, sex, gender, the nature of language, religion, ethics, knowledge, consciousness and ultimately, the meaning of life Each chapter presents a main topic, together with discussion of related ideas and arguments from various perspectives Addresses questions such as: Did evolution make men and women fundamentally different? Is the concept of race merely a social construction? Is morality, including universal human rights, (...) a mass delusion? Can religion and evolution really be harmonized? Does evolution render life meaningless? Written in a clear and informative style, with helpful references for further reading and research. (shrink)

This provocative text considers whether evolutionary explanations can be used to clarify some of life’s biggest questions. Examines topics of race, sex, gender, the nature of language, religion, ethics, knowledge, consciousness and ultimately, the meaning of life Each chapter presents a main topic, together with discussion of related ideas and arguments from various perspectives Addresses questions such as: Did evolution make men and women fundamentally different? Is the concept of race merely a social construction? Is morality, including universal human rights, (...) a mass delusion? Can religion and evolution really be harmonized? Does evolution render life meaningless? Written in a clear and informative style, with helpful references for further reading and research. (shrink)

With armed conflict in the Persian Gulf now upon us, Harvard archaeologist Steven LeBlanc takes a long-term view of the nature and roots of war, presenting a controversial thesis: The notion of the "noble savage" living in peace with one another and in harmony with nature is a fantasy. In Constant Battles: The Myth of the Peaceful, Noble Savage , LeBlanc contends that warfare and violent conflict have existed throughout human history, and that humans have never lived in ecological balance (...) with nature. The start of the second major U.S. military action in the Persian Gulf, combined with regular headlines about spiraling environmental destruction, would tempt anyone to conclude that humankind is fast approaching a catastrophic end. But as LeBlanc brilliantly argues, the archaeological record shows that the warfare and ecological destruction we find today fit into patterns of human behavior that have gone on for millions of years. Constant Battles surveys human history in terms of social organization-from hunter gatherers, to tribal agriculturalists, to more complex societies. LeBlanc takes the reader on his own digs around the world -- from New Guinea to the Southwestern U.S. to Turkey -- to show how he has come to discover warfare everywhere at every time. His own fieldwork combined with his archaeological, ethnographic, and historical research, presents a riveting account of how, throughout human history, people always have outgrown the carrying capacity of their environment, which has led to war. Ultimately, though, LeBlanc's point of view is reassuring and optimistic. As he explains the roots of warfare in human history, he also demonstrates that warfare today has far less impact than it did in the past. He also argues that, as awareness of these patterns and the advantages of modern technology increase, so does our ability to avoid war in the future. (shrink)