Kasper Braskén is Postdoctoral Researcher at Åbo Akademi University, Turku, Finland. He is a historian specialising in German, transnational and social movement history. He is the co-editor of H-Socialisms and the author of several articles on international solidarity, communism and anti-fascism.

"This book deals with the history of the International Workers' Relief or IWR and the pivotal role that Willi Munzenberg played in it. ... This is a well-written book, based on archival material from Germany, Russia and the Netherlands. ... overall Brasken has produced a highly valuable contribution to the history of the international communist movement of the 1920s." (Mario Kessler, European History Quarterly, Vol. 46 (2), January, 2016)

• 1. Introduction2. Awakening International Solidarity, 19213. Re-Imagining International Solidarity, 1922–234. Solidarity for Germany, 19235. Creating a Permanent International Solidarity Organisation6. Broadening and Radicalising Solidarity, 1924–327. Towards a Global International Solidarity, 1924–268. Solidarity on the Screen and Stage9. Celebrating International Solidarity, 1930–3210. International Solidarity against War and Fascism, 1927–33