At first glance, today’s strategic map seems familiar. A bloc of land-based powers, clustered around the center of Eurasia, is challenging a liberal, maritime order headed by an offshore superpower. China and Russia, reinforced by Iran and North Korea and ringed by autocracies from Belarus to Myanmar, now occupy the role that Napoleonic France, imperial Germany, and the Soviet Union each once held—continental empires seeking to dominate Eurasia and project power globally. The United States,