At a time when international relations theory is being criticized for its lack of cumulativeness, or worse, relevance, this book seeks to uncover theoretical and empirical knowledge about international conflict, crisis and war by exploring and applying new avenues of research and testing. With chapters on enduring rivalries, crisis bargaining, world wars, strategic surprise, defense allocations, war termination and conflict resolution, the contributors collectively develop a stronger foundation for answering pressing questions about the onset, escalation and deescalation of different forms of international violence.