Many historians have written off the significance of interwar internationalism. They have presented the League of Nations and the campaigns of internationally-minded groups as idealistic failures in an age that was characterized by international tension and aggressive nationalisms. This book challenges such narratives by assessing transnational projects that were launched or transformed after World War One, particularly the interaction of the League of Nations with specific groups or associations. The authors reveal the different rationales and stimuli for international cooperation in this...