The interwar peace movements were, according to conventional interpretations, naive and ineffective. More seriously, the standard histories have also held that they severely weakened national efforts to resist Nazi Germany and Stalinist Russia. Cecelia Lynch provides a long-overdue reevaluation of these movements. Throughout the work she challenges these interpretations, particularly regarding the postwar understanding of Realism, which forms the basis of core assumptions in international relations theory.The Realist account labels support for interwar peace movements as idealist. It holds...