How History Was Used in the Wars of the Twentieth Century: Perpetual War for Perpetual Peace looks at how historical thinking shaped decisions for war and peace in Germany and the United States during the twentieth century. It examines the writing and public careers of the leading historians in each nation. Robert J. Norrell suggests it is useful to analyze where the discipline of history has succeeded and failed to understand war and the many attempts to institute lasting peace. The narrative of this book testifies to the avid commitment of historians, statesmen, and the public to understanding the past and how these lessons and perspectives can influence the present.