This article tests some conditions that may lead to the emergence of unilineal descent, focusing on unilocality and warfare. Unilineal descent is thought to be likely in a unilocal society without a centralized political system that is experiencing intra- or inter-societal warfare. The authors also posit that a "clan" system usually develops prior to a "lineage" system.

This study examines the relationship between group exogamy and peace. None of the hypotheses were supported.

This study examines the relationship between group exogamy and peace. None of the hypotheses were supported.

This study examines the relationship between group exogamy and peace. None of the hypotheses were supported.

This study examines the relationship between group exogamy and peace. None of the hypotheses were supported.

This study examines the relationship between group exogamy and peace. None of the hypotheses were supported.

This article reviews the theories on age-set systems and presents a cross-cultural test of Bernardi's theory regarding the development of age-sets as a response to a need for a system of integration in the context of frequent warfare. The findings do not support the hypothesis but rather point to the importance of changing group size and composition of local groups, as well as warfare, in predicting age-set systems.

This article reviews the theories on age-set systems and presents a cross-cultural test of Bernardi's theory regarding the development of age-sets as a response to a need for a system of integration in the context of frequent warfare. The findings do not support the hypothesis but rather point to the importance of changing group size and composition of local groups, as well as warfare, in predicting age-set systems.

This article investigates the sexual division of labor between adults and children. Data analysis suggests that children usually perform tasks appropriate for an adult of the same gender, but boys will often perform women’s tasks while girls generally do not perform men’s tasks. Thus, women tend to benefit more from children’s labor.

This article investigates the sexual division of labor between adults and children. Data analysis suggests that children usually perform tasks appropriate for an adult of the same gender, but boys will often perform women’s tasks while girls generally do not perform men’s tasks. Thus, women tend to benefit more from children’s labor.