Researchers examine marriage patterns of 186 societies from the Standard Cross-Cultural Sample (SCCS). The eleven predictor variables are pathogen stress, arranged female marriages, population density, father roles during infancy, temperature, social stratification, wealth inequality, internal warfare, assault frequency, female agricultural contribution, and sex ratio. The two outcome variables measuring polygyny are cultural rules constraining polygyny and the percentage of married men who are polygynous. Controlling on phylogeny using a global supertree of the languages, analysis of marriage patterns reveals that assault frequency and pathogen stress are the strongest predictors of polygyny. These findings offer additional support for the theories of harem-defense polygyny and male genetic quality.

This study explores several correlates of interpersonal violence. Multiple regression analysis suggests that socialization for aggression in boys in late childhood is the strongest predictor of higher rates of homicide and assault. Path analysis suggests that socialization for aggression is a consequence, not a cause, of war.

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 article tests the general hypothesis that frequency of violent crimes by individuals is related to high concentrations of wealth.

This paper is an investigation into the relationship between social differentiation as a proxy for societal 'development' and various categories of crime. A positive relationship is interpreted by the author as empirical cross-cultural support for Durkheim's theory that these two factors will increase together as parallel processes of 'sociocultural evolution'.

This paper presents empirical tests of two theories put forth to explain violence toward women. The first predicts that warfare promotes socialization for aggression and legitimizes violence toward women, while the second predicts that violence works as a way to control potential for female infidelity. An association is found between high male-to-female sex ratio and violence towards women, suggesting support for the second theory over the first, which is consistent with more narrowly-focused studies by Avakame (1999), Bose et al. (2013), and D'Alessio & Stolzenberg (2010).

Causal factors to the development of crime are examined. Frequency of theft and personal crime are tested against these causal factors in a search for correlations.

This paper reviews the results of the author's cross-cultural studies of war and aggression and their implications for prehistory.

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 article tests several hypotheses related to the presence or absence of polygyny. Results suggest a negative relationship between polygyny and male provisioning, and positive relationships between polygyny and warfare, interpersonal aggression, and pathogen stress.