This study examines ecological, social, and psychological theories for men's fear of heterosexual sex in a cross-cultural sample. Findings support the hypotheses and a causal model is presented.

This study examines ecological, social, and psychological theories for men's fear of heterosexual sex in a cross-cultural sample. Findings support the hypotheses and a causal model is presented.

This study examines ecological, social, and psychological theories for men's fear of heterosexual sex in a cross-cultural sample. Findings support the hypotheses and a causal model is presented.

This article presents two evolutionary models that may explain relationships between war and socialization of children: the "environmentally contingent reproductive strategy" (ECRS) model put forward by Draper and Harpending (1982), and a model put forward by Carol and Melvin Ember. Results do not provide support for the hypotheses involving father-infant sleeping proximity derived from the ECRS model. The authors also find some inconsistencies with their own model.

This article presents theory and hypothesis tests that suggest that the decline of women's contribution to intensive agriculture is related to increases in fertility and domestic work associated with cereal crops. Additionally, men in agricultural societies are less likely to invest time in hunting and warfare, so their contribution of agricultural labor relative to women's increases.

This article presents a reanalysis of a study by Ember (1978) examining the predictors of men's heterosexual fear. The author finds that Ember's model is not upheld and presents a new model of men's heterosexual fear using path analysis. Results suggest that mother-child sleeping arrangements and food shortage are directly related to men's heterosexual fear.

This article presents theory and hypothesis tests that suggest that the decline of women's contribution to intensive agriculture is related to increases in fertility and domestic work associated with cereal crops. Additionally, men in agricultural societies are less likely to invest time in hunting and warfare, so their contribution of agricultural labor relative to women's increases.

This study focuses on preferences for thinness or fatness in women cross-culturally. Results contradict previous studies and the hypothesis that preference for fatness in women is predicted by resource scarcity. Alternative explanations for valuation of fatness are explored, including climate and male dominance.

This article focuses on environmental and social explainations for variations in sonority. As expected, results suggest that climate, vegetation density, and sexuality are associated with sonority.

This paper suggests a tentative analysis of continuous female sexual receptivity based on a random sample of mammals and birds. It is suggested that humans developed continuous female sexual receptivity because humans have the unusual combination of long infant dependency, group living, and male-female bonding.