This chapter examines possible futures for American foreign policy in terms of the interests and ideology of the U.S. elites (and to a lesser extent the population at large), the structures of U.S. political life, and the real or perceived national interests of the United States. It first provides an overview of the ideological roots of U.S. foreign policy before discussing key contemporary challenges for U.S. foreign policy. In particular, it considers American relations with China, how to mobilize U.S. military power for foreign policy goals, and the issue of foreign aid. The chapter proceeds by analysing the most important features of America’s future foreign policies, focusing on the Middle East, the Far East, Russia and the former Soviet Union, and Europe and the transatlantic relationship. It concludes by describing some catastrophic scenarios that could accelerate the decline of US power.