A rethinking of the factors which led to the American entry into the war. The complicated situation which led to the American entry into the First World War in 1917 is often explained from the perspective of public opinion, US domestic politics, or financial and economic opportunity. This book, however, reasserts the importance of diplomats and diplomacy. Based on extensive original research, the book provides a detailed examination of British, German, and American diplomacy in the period 1914-17. It argues that British and German diplomacy in this period followed the same patterns as had been established in the preceding decades. It goes on to consider key issues which concerned diplomats, including the international legality of Britain’s economic blockade of Germany, Germany’s use of unrestricted submarine warfare, peace initiatives, and Germany’s attempt to manipulate in its favour the long history of distrust in Mexican-American relations. Overall, the book demonstrates thatdiplomats and diplomacy played a key role, thereby providing a fresh and original approach to this crucially important subject. JUSTIN QUINN OLMSTEAD is an Assistant Professor of History at the University of Central Oklahoma.