This study empirically tests two models of war, sports, and aggression: the drive discharge model which predicts sports and war will be inversely associated, and the culture pattern model which predicts sports and war will be directly associated. A direct association is supported. Relevant theory is discussed.

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.

The researchers use phylogenetic methods to map out the evolutionary trajectories of land tenure norms across 97 Austronesian societies. The analysis suggests the relevance of vertical transmission in patterning land tenure norms, rather than horizontal transmission. It also strongly supports a model along a N(none)-I(individual)-G(group)-K(kin) pathway.

In this paper, the authors utilize phylogenetic methods to reconstruct the evolution of land tenure norms among 97 Austronesian societies. They coded these norms for each society as none (N), group (G), group-kin (K), and individual (I). After formulating various models of evolution through these various stages, they used Bayesian analysis to determine support for each. They conclude with remarks about this type of evolutionary phylogenetic research as a form of "virtual archeology."

This article uses signaling theory and tests for a relationship between costly male rites and frequency of warfare.

This study examines the relationship between sexual dimorphism and degree of polygyny. Authors test this relationship in both humans and non-human species. In non-human species, every correlation between sexual dimorphism (measured by body length) and degree of polygyny was significant. In human populations, sexual dimporhism was not related to degree of polygyny, however, there were some differences between populations with socially imposed monogomy and those with ecologically imposed monogamy.

This study explores the relationship between level of legal evolution (measured on a Guttman scale that ranges from just mediation to counsel, police, and mediation) and level of societal complexity. Results suggest a significant association between level of legal evolution and level of societal complexity.

This book examines naming practices cross-culturally. The author posits that naming practices help to both reflect and create conceptions of personal identity. Several correlations between name meanings and practices and various sociocultural variables are presented.

This article examines the artistic encouragement of collective action during premodern regime building. No cross-cultural empirical hypotheses are tested, but the author identifies artistic processes that promoted the moral capacity for political commitment in a collective (rather than autocratic) polity.

This study examines aggression in folktales in relation to child socialization variables. The author suggests that punishment for aggression and aggression anxiety are related to how aggression is portrayed in folktales. Hypotheses are supported.