This timely book offers an accessible introduction to religion in international affairs. Shireen T. Hunter highlights the growing importance of religion in politics and analyzes its nature, role, and significance. She places the question of religion’s impact on global affairs in the broader context of state and nonstate actors, weighing the factors that most affect their actions. Through the lens of three compelling and distinctive case studies—Russia’s response to the Yugoslav crisis, Turkey’s reaction to the Bosnian war, and Europe’s policy toward Turkish membership in the EU—Hunter demonstrates that religion increasingly shapes international affairs in significant and diverse ways. Her book is essential reading for anyone needing a better understanding of why and, more important, how, religion influences the behavior of international actors and thus the character of world politics.