Since 1990 Russia has experienced an unexpected “ethnic revival.” Varying widely in geography, culture, economic development, and institutional history, the country's thirty-two ethnic regions offer a chance to weigh the evidence for alternative theories of separatist activism. This paper examines statistically why some—such as Chechnya and Tatarstan—have come to epitomize demands for greater independence, while others—such as Mordovia or Chukotka—have remained largely quiescent. It finds that, while a Muslim religious tradition predisposed a region's leaders to press greater separatist demands, such primordial factors werefilteredthrough a rational calculus of the region's relative bargaining power in negotiations with the center and of the leader's own organizational interests. Contrary to some leading theories, the most developed, resource-rich, and high-income groups and regions were more separatist than more economically backward ones.