Cultural identity has become prominent in studies of world politics in the post-Cold War era. First, a growing literature in world politics has emerged that focuses on the impact of social culture, broadly conceived as the shared religious, racial or ethnolinguistic characteristics of a society. The significance of this aspect of culture is epitomized in studies focusing on ‘ethnic conflicts’, ‘ethnic security dilemmas’, and most prominently in Huntington's ‘clash of civilizations’ thesis, which suggests, among other things, that shared civilization membership is the fulcrum upon which post-Cold War era world politics rests. Secondly, the impact of political culture, broadly conceived as the shared norms and institutions guiding political behaviour in a society, has become increasingly salient, as evidenced by the bourgeoning literature on the democratic peace thesis, which posits that the extent to which a state (or pair of states) is democratic is a major determinant of its war-proneness. Adherents of this view argue either that although democracies are just as war-prone as non-democracies they rarely fight other democracies, or that democracies are more peaceful than non-democracies, in general.