The article examines whether cultural groups tend to use supernatural beliefs more to explain natural phenomena or social phenomena. Analysis of ethnographic text from 114 diverse societies reveals that supernatural explanations are more common for natural phenomena, consistent with the theory that humans tend to perceive intent and agency in the natural world. However, supernatural explanations of social phenomena were more prevalent in urbanized societies with greater social complexity and anonymity. The study highlights how people use supernatural beliefs to explain their world and how this varies across small-scale and urbanized communities.

This article investigates the relationship between aggression in warfare and deindividuation (or the loss of self-awareness in groups). Results suggest a significant positive relationship between these two variables.

A model for the development of counting systems is tested. The hypothesis presented predicts that unpredictable climate conditions result in inconsistent food supply which leads to the need for food storage and, thus, a system to account for the stored food. Results strongly support this hypothesis.

This book takes a cross-cultural, cross-historical approach to the study of military deterrence. Political, economic, and geographic correlates are considered, particularly military and diplomatic strategy. Several hypotheses are tested and some are supported.