This collection offers a detailed examination of European security from the mid-1960s to the mid-1970s with focus on five areas: 1) the first stirrings of détente in West German-Soviet relations, the framework conditions of domestic and foreign policy on the two sides and the extent to which interests ultimately enshrined in treaties were contradictory and/or compatible; 2) the preconditions of détente in the first half of the Brezhnev era; 3) economic interests as a driving force of political change; 4) the consequences of the Treaty of Moscow for East European states; and 5) the consequences of the Transatlantic partnership. The contributors highlight the complexity of domestic and international considerations that produced Ostpolitik and the subsequent emergence of long-term East-West détente in Europe, while offering the argument that Eastern policies and détente only came to fruition after the climax of the Cold War.