The post World War II world has witnessed a proliferation of conflicts based on ethnic differences. Religion and national identity are two dominant features of many of these ethnic struggles. The purpose of this study is to determine which of the two has a greater impact on protest and rebellion using large-n methodology, employing variables from the Minorities at Risk Phase 3 dataset as well as data collected independently. It was found that the simple answer is that nationalism has a greater impact on conflict than does religion. However, this simple answer is not an accurate answer. This is because the simple answer that nationalism has a greater influence is to a great extent due to the fact that the majority of ethnic conflicts are between groups that are not religiously different. If one looks only at those ethnic conflicts where religion can potentially be a factor, religious and national issues are involved in ethnic conflicts approximately as often. Also, while religious issues alone seem to have less of an influence on ethnic conflict than national issues, religious issues have a strong influence on the relationship between nationalism and ethnic conflict, to the extent that the relationship between nationalism and ethnic conflict can not be fully understood without accounting for the influence of religion.