This book is a comprehensive study of cooperation among the advanced capitalist countries. Can cooperation persist without the dominance of a single power, such as the United States after World War II? To answer this pressing question, Robert Keohane analyzes the institutions, or 'international regimes', through which cooperation has taken place in the world political economy and describes the evolution of these regimes as American hegemony has eroded. Refuting the idea that the decline of hegemony makes cooperation impossible, he views international regimes not as weak substitutes for world government but as devices for facilitating decentralized cooperation among egoistic actors. In the preface, the author addresses the issue of cooperation after the end of the Soviet empire and with the renewed dominance of the United States, in security matters, as well as recent scholarship on cooperation.