In January 1942, the Declaration by United Nations forged a military alliance based on human rights principles that included over 24 countries, marking the beginning of the UN. But how did the armies of the United Nations co-operate during World War II to halt Nazi expansionism? When did the UN start to tackle the international economic and social challenges of the post-war world? This is the first book to explore how the profound restructuring of the international world order was organized. Drawing on previously unknown archival material, Plesch analyzes the engagement with the UN by all levels of society, from grassroots to the political elites. Plesch has pieced together the full story of how the UN intervened in surprising ways at a pivotal time in world history and argues that the UN s success is as vital today as it was then."