A recent Climatic Change review article reports a remarkable convergence of scientific evidence for a link between climatic events and violent intergroup conflict, thus departing markedly from other contemporary assessments of the empirical literature. This commentary revisits the review in...

Much of the recent literature on civil war treats explanations rooted in political and economic grievances with considerable suspicion, and many empirical studies conclude that there is no relationship between ethnic diversity or measures of inequality and political violence to support such...