Refugees lie at the heart of world politics. The causes and consequences of, and responses to, human displacement are intertwined with many of the core concerns of International Relations. Yet, scholars of International Relations have generally bypassed the study of refugees, and Forced Migration Studies has generally bypassed insights from International Relations. This volume therefore represents an attempt to bridge the divide between these disciplines, and to place refugees within the mainstream of International Relations. Drawing together the work and ideas of a combination of the world's leading and emerging International Relations scholars, the volume considers what ideas from International Relations can offer our understanding of the international politics of forced migration. The insights draw from across the theoretical spectrum of International Relations from realism to critical theory to feminism, covering issues including international cooperation, security, and the international political economy. They engage with some of the most challenging political and practical questions in contemporary forced migration, including peacebuilding, post-conflict reconstruction, and statebuilding. The result is a set of highly original chapters, yielding not only new concepts of wider relevance to International Relations but also insights for academics, policy-makers, and practitioners working on forced migration in particular and humanitarianism in general.