Based on new and existing research by a world-class scholar, this is the first book in twenty years to examine the dynamics of the entire American-West European relationship since 1945. The relationship between the United States and Western Europe has always been crucial, and recent events dictate that it is becoming ever more so. In this important new work, Geir Lundestad analyses the balance between the cooperation and conflict which has characterized this relationship in the post-war period. He examines talk of transatlantic drift, and the strain now apparent between the USA and the nation states of Western Europe. In the concluding section, Lundestad offers a topical view of the future of transatlantic interaction. Throughout the work Lundestad's much cited 'empire by invitation' thesis is both put into practice and extended in time and scope. This book is essential reading for anyone interested in one of the most important and enduring international relationships of the last sixty years.