In recent years, the idea that the United States is an empire in decline has gained considerable support, some of it from quarters that until very recently would have denied it was ever an empire at all. The New York Times, for instance, has run columns that describe a “remarkably benign” American empire that is “in retreat”, or even at risk of decline and fall.

Yet the shadow American power still casts over the rest of the world is unmistakable. The US has military superiority over all other countries, control of the world’s oceans via critical sea lanes, garrisons on every continent, a network of alliances that covers much of the industrial world, the ability to render individuals to secret prisons in countries from Cuba to Thailand, preponderant influence over the global financial system, about 30% of the world’s wealth and a continental economy not dependent on international trade.

To call this an empire is, if anything, to understate its range. Within the American security establishment, what it amounted to was never in doubt. US power was to be exercised around the world using the “conduits of national power”: economic centrality, military scale, sole possession of a global navy, nuclear superiority and global surveillance architecture that makes use of the dominant American share of the Earth’s orbital infrastructure.

If proponents of the end of the US global order do not assert a decrease in the potency of the instruments of American power, that is because there has been no such decrease. The share of global transactions conducted in dollars has been increasing, not declining. No other state can affect political outcomes in other countries the way the US still does. The reach of the contemporary US is so great that it tends to blend into the background of daily events. In January 2019, the US demanded that Germany ban the Iranian airline Mahan Air from landing on its territory. In September 2020, it sanctioned the chief prosecutor of the…