The global order that has held sway in world political affairs for decades—dominated by the United States, Russia, China, and the European Union—is now in an uneasy period of instability and turmoil, driven as much by failures of governance as by the rise of smaller powers. Multipolarity explores both the causes of this decline in power—from Brexit and Trump to the rise of autocratic strongmen in Europe and Asia—along with a number of possibilities for a more decentralized world, among them a Russian pivot to the east and the rise of African influence worldwide. The authors examine the diffusion of power among newly emerging leaders on the world stage, offering a multitude of potential roadmaps for creating security and stability in a changing world.