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 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.

The reasons "primitive" peoples engaged in warfare are discussed. In order to resolve any inconsistencies in previous studies of warfare, this article looks closely at Textor's (1967) warfare variables and their correlations with other variables included in Textor's (1967) anthropological summary.

This article uses factor analysis to identify the key variables underlying the many cross-cultural associations reported by Textor (1967). Twelve factors are identified.

This book examines the characteristics of warlike and warless foraging societies, as well as the transitional stages that occur when a society becomes warlike. Several predicted correlates of warfare frequency are supported.

The author analyzes conditions that might favor social resilience during the Late Antique Little Ice Age (ca. 536-556 CE). The assumption is made that climatic conditions in the Northern Hemisphere during this period of time are very similar to those that would occur during a nuclear winter. These conditions include a drop in temperature and decreased solar radiation from volcanic eruptions. Measures for social resilience come from multiple variables for social change, which are tested against measures for type of political engagement. It is argued that broad political participation is correlated with resilience.

This article challenges common assumptions about hunter-gatherers and demonstrates that previous ideas about residence, division of labor and warfare are not supported by the cross-cultural data.

This study explores possible causes of matrilocal residence. Previous hypotheses are unsupported. Results show a significant relationship between matrilocality and recent migration.

Author proposes and presents evidence in support of the theory that most societies practice virilocal or patrilocal residence (this is the "normal" pattern" and that matrilocal residence is adopted when societies migrate to an already populated area.

This book examines the difference between warless and warlike societies and attempts to determine the point at which a society becomes warlike. The author suggests that differences between warless and warlike societies are mostly organizational and hypothesizes that "unsegmented" societies, or societies that have a weaker sense of group identity and cohesion, will be more likely to be warless than "segmented" societies. Several tests are presented. Results generally support the hypothesis.