This study examines the relationship between pairbonds and lactation, specifically the relationship between pairbond stability, alloparenting, and cross-cultural trends in breastfeeding. Findings show that both conjugal stability and availability of alloparental care are associated with age at weaning.

This book examines social, cultural, biological and psychological aspects of human sexuality. Sex and reproduction are both discussed in depth. Empirical analysis is included throughout, and an integrated model of sexuality is discussed. Only a few selected hypotheses are entered here.

This study focuses on the relationship between women's power/status and divorce. Tests of gender variables with measures of divorce highlights the importance of sexual equality in divorce frequency as well as the effect of division of labor on divorce.

This book examines population growth rate and its correlates by testing 274 hypotheses (derived from multiple theories) with an 18-society sample. Forty-one of these hypotheses were significant at the .05 level, leading the author to accept these relationships as reflective of the real world. The 274 hypotheses are grouped into 51 broader hypotheses, and marked by (*) where relationships are significant as designated by the author or by significance p < 0.05.

This study reveals that in hunting and gathering societies thought to be akin to those of our ancestors, female choice is constained by the control that parents exercise over their daughters. Since parental control is the typical pattern of mate choice among extant foragers, it is likely that this pattern was also prevalent throughout human evolution.

This study focuses on predictors of divorce, cross-culturally. Variables measuring infidelity, infertility, personality, economy, kin, absence, health, ritual and politics are tested. An evolutionary/adaptionist approach is found to be most useful in explaining the nature of conjugal dissolution cross-culturally.

Previous studies have proposed a model of sexual selection that dictates that along with female and male choice, parental choice constitutes a significant sexual selection force in our species. This article aims at examining whether this model can also account for the mating patterns typical of agricultural and pastoral societies. The hypotheses are supported by the results presented.

This article investigates how population density affects social behavior, particularly whether it is a cause of stress in humans that manifests in pathological behavior or mistreatment of children. Analysis indicates that population density is not a cause of these behaviors, and with some variables (such as with divorce and sexual anxiety), there is a negative association with population density.

Textor summarizes cross-cultural findings on polygyny pertaining to cultural, environmental, psychological, and social phenomena.

This article analyzes the predictors of private property ownership with an aim to replicate existing correlations using data from the dissertation of Zelman (1974).