This study examines the variability of siestas across cultures and considers how factors including climate, subsistence type, and disease susceptability relate to the presence or absence of siestas. The author finds a significant relationship between siestas and the presence of malaria.

This study examines the variability of siestas across cultures and considers how factors including climate, subsistence type, and disease susceptability relate to the presence or absence of siestas. The author finds a significant relationship between siestas and the presence of malaria.

In this study, the authors draw from intensity theory and combine previous research from the fields of behavioral ecology, economics, and social evolution to analyze drivers in the emergence and persistence of inequality across the world. They propose that environmental heterogeneity and circumscription (the difficulty of moving and establishing oneself in a new environment relative to remaining in the current one) play a significant role in the stratification of societies. Their results indicate that situations arise from various environmental conditions and levels of circumscription that may result in an individual giving up autonomy for material gain, thus favoring inequality.

This paper supports Beatrice B. Whiting's (1965) sex-identity conflict hypothesis which suggests a relationship between males' early identification with their mothers and male violence. Authors find that, in addition to socialization aggression, frequency of homicide/assault is significantly related to father-infant sleeping distance, particularly when residence is not matrilocal and/or warfare is more than occasional.

This paper supports Beatrice B. Whiting's (1965) sex-identity conflict hypothesis which suggests a relationship between males' early identification with their mothers and male violence. Authors find that, in addition to socialization aggression, frequency of homicide/assault is significantly related to father-infant sleeping distance, particularly when residence is not matrilocal and/or warfare is more than occasional.

The second and third parts of this book classify the economic systems of foraging and agricultural societies in the SCCS based on correlations between their institutions of property an distribution. These economic types are then examined for relationships with other social, political, demographic, and environmental factors in order to draw tentative conclusions regarding the origins of the Agricultural and Industrial Revolutions. The fourth part of the book uses cross-national data to examine similar associations in industrial/service economies, and is not included here.

This study examines the association between post-marital residence patterns and dwelling size in pre-industrial societies using comparative methods and a global sample of 86 societies. The results suggest that matrilocality is associated with larger dwellings (over 65 square meters) in agricultural societies, while patrilocality is associated with smaller dwellings. The study also finds that sedentism is the single best predictor of house size. The study concludes that post-marital residence and house size evolve in a correlated fashion, which can help make reliable inferences about the social organization of prehistoric societies from archaeological records.

Based on prior findings, the present study tests the theory that subsistence type, specifically agricultural level, influences descent type, conjugal formation, and marriage type. All three of the latter variables are predicted to be antecedents of ancestor worship. The author claims support for the theory.

This article examines reasons for the variation in sexual foreplay practices cross-culturally. Results suggest that exclusive mother-child sleeping arrangements is significantly associated with the presence of foreplay.

Based on prior findings, the present study tests the theory that subsistence type, specifically agricultural level, influences descent type, conjugal formation, and marriage type. All three of the latter variables are predicted to be antecedents of ancestor worship. The author claims support for the theory.