This, then, is the difficult situation of America’s protectorates today. Worried about the decline of the U.S., much of the American-led world has clung even more tightly to Washington than before. In Asia, the U.S. remains the only power capable of balancing against China’s bid for regional hegemony. In Europe, something similar is true with regard to Russia. To the continent’s eternal shame, as one senior British official told me, the apparently divided, dysfunctional, and declining power of the U.S. has still managed to send drastically more lethal aid to save a European democracy than any other NATO power.

Such is America’s continuing dominance, in fact, that the world’s fixation on the idea of its impending demise seems both a dramatic overreaction and a dramatic underreaction. The depth of America’s military-industrial complex and the scale of its imperial bureaucracy mean that they are simply too heavy for a single president or Congress to remove in one go. To an extraordinary degree, American power has been vaccinated against its own political dysfunction, as Trump’s time in office showed.

And yet the very weight of this Pax Americana means that if the vaccine ever stopped working, the consequences would be globally historic. In Poland and Japan, Taiwan and Ukraine, the very basis of the world order today rests on American supremacy. But besides talking about the fragility of these foundations, no one is actually doing anything to secure them.