The book produced by Alex Weisiger is a substantial contribution to rationalist theory in international relations. Weisiger investigates the effects of commitment problems in international bargaining on the conduct, duration, and destructiveness of wars. The book is among only a few works that closely analyze international history from the perspective of recent developments in the theory of international bargaining. Weisiger is superb at framing history as a series of mysteries, the answers to which he dramatically unravels. In addition to its contribution to research on international conflict, therefore, the book is immensely valuable as a teaching tool.