Democracies rarely if ever fight one another, but they participate in wars as frequently as autocracies. They tend to win the wars in which they participate. Democracies frequently build large alliances in wartime, but not only with other democracies. From time to time democracies intervene...

Why do larger countries have more armed conflict? This paper surveys three sets of hypotheses forwarded in the conflict literature regarding the relationship between the size and location of population groups: Hypotheses based on pure population mass, on distances, on population concentrations,...

No systematic study has examined the effect of post-conflict justice on the duration of peace on a global basis. This paper attempts to fill that void by building on a newly constructed dataset (Binningsbo, Elster, and Gates 2005), which reports the presence of various forms of post-conflict...