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.

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.

This article uses a Darwinian approach, predicting that hierarchies persist and increase in social evolution because they increase fitness for individuals at higher levels within the hierarchy who choose to further social assymetry and benefit their fitness at the expense of the greater group. Polygyny is used as the indicator of fitness. Correlations tested support the hypothesis.

This article uses a Darwinian approach, predicting that hierarchies persist and increase in social evolution because they increase fitness for individuals at higher levels within the hierarchy who choose to further social assymetry and benefit their fitness at the expense of the greater group. Polygyny is used as the indicator of fitness. Correlations tested support the hypothesis.

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 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 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 study tests three hypotheses on the evolution of the human pair-bond: male-provisioning, male mating competition, and the defense of offspring from other males. Findings indicate that male provisioning and mating competition are factors in the development of the pair-bond. Additional findings indicate that alloparentling, polygyny, and equal contribution to subsistence by each sex contribute to the security of the pair-bond.

This study tests three hypotheses on the evolution of the human pair-bond: male-provisioning, male mating competition, and the defense of offspring from other males. Findings indicate that male provisioning and mating competition are factors in the development of the pair-bond. Additional findings indicate that alloparentling, polygyny, and equal contribution to subsistence by each sex contribute to the security of the pair-bond.

This study discusses many variables that may influence the direction of altruism within a family. Significant relationships were found between paternity certainty, conjugal instability, marital residence, cross-cousin marriage preferences, and direction of altruistic behavior. Special emphasis is placed on the importance of the mother's brother.