The U.S. and the world are increasingly polarized. America’s internal polarization raises questions about its dependability as a friend and ally. What does this mean for America’s global standing, its national interests and its ability to influence international policy? As the international order frays, what will replace it? What do demographics tell us about future centers of power and disarray? How will the U.S. cope with transnational challenges such as immigration? What can we predict about the future of economic and political power—and the role of America in the new map of geopolitics?