Harvard government professor Stephen Rosen assesses the current geopolitical environment, and considers America’s capacity to meet its foreign policy responsibilities and deter its adversaries. Detailing threats to America from a rising China, the success of bad actors in the Middle East, and other geopolitical turmoil, Rosen explains why America must compete in economic, political, and military arenas—and reflects on the deleterious consequences of American disengagement from the world.