The world is on the cusp of a global turn. Between 1500 and 1800, the West sprinted ahead of other centers of power in Asia and the Middle East. Europe and the United States have dominated the world since. But today the West's preeminence is slipping away as China, India, Brazil and other emerging powers rise. Although most strategists recognize that the dominance of the West is on the wane, they are confident that its founding ideas--democracy, capitalism, and secular nationalism--will continue to spread, ensuring that the Western order will outlast its primacy. In No One's World, Charles A. Kupchan boldly challenges this view, arguing that the world is headed for political and ideological diversity; emerging powers will neither defer to the West's lead nor converge toward the Western way.