How did South Sudan become one of the most striking examples of state-building failure and state collapse after years of international support? What went wrong in the state-building enterprise? How did external intervention overlap and intertwine with local processes of accumulation of power and of state formation? This book addresses these questions analysing the intersection between international and local actors and processes. Based on original ethnographic and archival data, it provides a unique account of how state-building resources were captured and manipulated by local actors at various levels, contributing to the deepening of ethnic fragmentation and the politicization of ethnicity.