This collection of essays offers a fresh look at the 1970s, the crucial decade when the nuclear non-proliferation regime took shape. Exploring a broad array of newly declassified archival sources from different countries across the globe, and moving freely across methodological and national barriers, historians from Europe, North and South America, Asia and Africa discuss the making of the global nuclear order from truly international and transnational perspectives. The result is a fascinating and innovative volume which will remain an essential reference for historians of the nuclear age, of the cold war, and more generally of the evolution of the international system in the second half of the twentieth century. The chapters in this book were originally published as a special issue of The International History Review.