This book examines the underlying reasons for the longevity of detente and its impact on East-West relations during the last decade of the Cold War. The volume examines the relevance of trade across the Iron Curtain as a means to facilitate mutual trust, as well as the emergence of new habits of transparency regardless of recurring military crises. A major theme of the book concerns Helmut Schmidt's foreign policy and his contribution to the resilience of cooperative security policies in East-West relations. It examines Schmidt's crucial role in the Euromissile crisis, his Ostpolitik diplomacy, and his pan-European trade initiatives to engage the Soviet Union in a joint perspective of trade, industry and technology. Another key theme concerns the crisis in US-Soviet relations and the challenges of meaningful leadership communication between Washington and Moscow in the absence of back-channel diplomacy during the Carter and Reagan years. The book depicts the freeze in US-Soviet relations after the Soviet invasion in Afghanistan, the declaration of martial law in Poland, and Helmut Schmidt's efforts to serve as a mediator and interpreter working for a relaunch of US-Soviet dialogue. This book will be of interest to students of Cold War Studies, diplomatic history, foreign policy and International Relations.