These days, international relations (IR) and the study of war need more books that are big in ambition, asking important questions and providing sweeping answers.  Unfortunately, the professional incentives in political science these days tend to steer most scholars away from writing big books.  It is hard to imagine returning to the heyday of big IR books from 1976 to 1981, a period that saw the publication of an extraordinary series of path-breaking works, including Robert Jervis’ Perception and Misperception in International Politics, Hedley Bull’s The Anarchical Society, George Quester’s Offense and Defense in the International System, Richard Ned Lebow’s Between Peace and War, Kenneth Waltz’s Theory of International Politics, Bruce Bueno de Mesquita’s The War Trap, A. F. K. Organski’s and Jacek Kugler’s The War Ledger, Robert O. Keohane’s and Joseph Nye’s Power and Interdependence, Stephen Krasner’s Defending the National Interest, and Robert Gilpin’s War and Change in World Politics, to name a few.[1]

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