The authors construct a mathematical model from which they generate their main hypothesis that resource unpredictability should be associated with frequency of warfare. A cross-cultural test of this hypothesis was performed by Ember and Ember (1992). The authors critique these findings for state societies and test and alternate hypothesis for application to state societies.

In this article, the authors reevaluate Carneiro's (1970) circumscription theory of state formation. They do this by examining relationships between the degree of political hierarchy and whether warfare is conducted for conquest, land acquisition, or plunder. While they find evidence that this theory is plausible in some situations, there is not enough to support the theory wholesale. Thus, they suggest that other theories of state formation should be investigated.

This article examines the relationship between warfare and trade and concludes that the relationship varies within different levels of political organization.

In this article, the authors reevaluate Carneiro's (1970) circumscription theory of state formation. They do this by examining relationships between the degree of political hierarchy and whether warfare is conducted for conquest, land acquisition, or plunder. While they find evidence that this theory is plausible in some situations, there is not enough to support the theory wholesale. Thus, they suggest that other theories of state formation should be investigated.

In this article, the authors reevaluate Carneiro's (1970) circumscription theory of state formation. They do this by examining relationships between the degree of political hierarchy and whether warfare is conducted for conquest, land acquisition, or plunder. While they find evidence that this theory is plausible in some situations, there is not enough to support the theory wholesale. Thus, they suggest that other theories of state formation should be investigated.

The article tests theories that may explain why warfare frequency varies from society to society. The focus is on ecological problems, particularly different kinds of resource scarcity, but social and psychological theories are also tested with both bivariate and multivariate analyses. Because unpredictable disasters are such a strong predictor in nonstate societies, the authors theorize that war may mostly be caused by a fear of nature.

The article tests theories that may explain why warfare frequency varies from society to society. The focus is on ecological problems, particularly different kinds of resource scarcity, but social and psychological theories are also tested with both bivariate and multivariate analyses. Because unpredictable disasters are such a strong predictor in nonstate societies, the authors theorize that war may mostly be caused by a fear of nature.

The article tests theories that may explain why warfare frequency varies from society to society. The focus is on ecological problems, particularly different kinds of resource scarcity, but social and psychological theories are also tested with both bivariate and multivariate analyses. Because unpredictable disasters are such a strong predictor in nonstate societies, the authors theorize that war may mostly be caused by a fear of nature.

The article tests theories that may explain why warfare frequency varies from society to society. The focus is on ecological problems, particularly different kinds of resource scarcity, but social and psychological theories are also tested with both bivariate and multivariate analyses. Because unpredictable disasters are such a strong predictor in nonstate societies, the authors theorize that war may mostly be caused by a fear of nature.

This study tests a hypothesis developed in a previous study (Artemova 2003). The authors analyze the relationship between the monopolization of politically important information and gender inequality. Sixty correlations are tested between measures of female status and an indicator of information monopolization; findings support the hypothesis.