One of the most brilliant and influential international relations scholars of his generation, Joseph S. Nye Jr. is one of the few academics to have served at the very highest levels of US government. This volume collects together many of his key writings for the first time as well as new material, and an important concluding essay which examines the relevance of international relations in practical policymaking. This book addresses America's post-Cold War role in international affairs; the ethics of foreign policy; the information revolution; and terrorism.