Since the periods of decolonization and the Cold War, Africa has been the site of numerous protracted conflicts. Some countries have experienced repeated cycles of violence and civil war, while other countries have headed off major conflict and maintained relative peace. What factors account for these differences? In a clear, compelling, theoretically innovative study, Philip Roessler argues that civil wars often emerge from power struggles among political elites. In fragile, ethnically divided states, powerholders have greater fear of coups d’état staged by rivals at the core than civil wars waged by excluded minorities on the periphery. As a result, powerholders in weak states are likely to incorporate potential rivals at the center in a system of ethnic power sharing and to exclude regional and ethnic minorities on the margins. While such tactics may work in the short term, ongoing rivalry at the center, compounded by political exclusion elsewhere, may eventually lead to the coup–civil war trap. In such cases, rival power aspirants may mobilize marginalized groups, with civil war as an outcome.