This study examines the relationship between political participation and warfare, suggesting that checks on power, removal of leaders, extent of political participation, and absence of fission will be negatively associated with the frequency of warfare. This hypothesis was supported with empirical analysis.

This study examines the relationship between equality and democracy, focusing on social stratification and political participation as the primary measures. Results suggest that equality strengthens some aspects of democracy, but several other factors such as industrialization are involved in the relationship.

This article tests the effects of variables associated with political participation on the frequency of internal warfare. Findings suggest support for the hypothesis that democracies rarely fight each other.