Bestselling author and strategist Ian Bremmer argues that Washington's directionless foreign policy has become expensive and dangerous. Since the end of the Cold War, the U.S. has stumbled from crisis to crisis in Afghanistan, Iraq, Iran, Libya, Syria, and Ukraine with no clear strategy. Bremmer urges us to think more deeply about what sort of role America should play and how it should use its superpower status. He explores three competing options:...