Jessica Weeks's 'Dictators at War and Peace' provides the first systematic analysis of how different types of authoritarian regimes behave in international relations. Weeks, a political scientist at the University of Wisconsin, challenges the common assumption that all dictatorships are equally aggressive or unpredictable. She develops a typology distinguishing between regimes based on whether leaders face domestic audiences who can punish them for foreign policy failures. Military juntas, for example, must satisfy officer corps who can remove them, creating different incentives than personalist dictators who face no such constraints. Weeks tests her theory against extensive data on international conflicts, showing that some authoritarian types are actually less war-prone than democracies while others are significantly more dangerous. The book's theoretical framework helps explain puzzling cases: why some dictators back down from crises while others escalate, why military governments sometimes exercise restraint that their reputation for aggression would not predict. Weeks writes clearly for readers without specialized training while maintaining scholarly rigor. Anyone seeking to understand how authoritarian states behave internationally will find this essential reading, particularly given the increasing prominence of non-democratic powers in world politics.