Abstract
In this paper, we analyze a sample of 46 ethnic boundaries drawn from the literature. The principal aim is to test whether there is a universal syndrome of ethnocentrism, the idea that ethnic relations can be characterized along a single dimension of differences, or, whether there are instead multiple types of ethnic relations. The latter hypothesis is based on a cultural evolutionary perspective that suggests that there may be competing forces leading to the evolution of ethnic markers, and hence to the possibility that ethnicity is a multi-dimensional phenomenon. These competing forces may yield a variety of types of ethnic boundaries, not all of which may be conflictual. Thus, we also examine what factors do most closely correlate with violent conflict.