On opposite sides of the globe, two debates that will profoundly affect the future of the United States, and indeed the world, are raging. One of them has become shrilly public, while the other remains almost secret. On the surface they might seem to have little to do with each other, but at bottom, they are inextricably linked.
The first debate, which is unfolding in America, concerns immigration. Republicans like Donald Trump and Ted Cruz have staked out some of the more radical positions in this debate, such as urging that the U.S. build a wall to keep out illegal immigrants and that it deport the millions who are already here. The other debate, which is playing out in Beijing, is about how big a navy China should build, and how much it should contest America’s primacy in the world’s oceans.
To a degree scarcely suspected by most people, both debates—and more generally, America’s chances of maintaining its standing in the world—are bound up in the two countries’ sharply contrasting population dynamics.
Under President Xi Jinping, China has until very recently appeared to be a global juggernaut—hugely expanding its economic and political relations with Africa; building artificial islands in the South China Sea, an immense body of water that it now proclaims almost entirely its own; launching the Asian Infrastructure Investment Bank, with ambitions to rival the World Bank. The new bank is expected to support a Chinese initiative called One Belt, One Road, a collection of rail, road, and port projects designed to lash China to the rest of Asia and even Europe. Projects like these aim not only to boost China’s already formidable commercial power but also to restore the global centrality that Chinese consider their birthright.