Trump is correct in suggesting that the current global system is an aberration in American history, that it may not be sustainable forever under current conditions, and that America should focus more on fixing our own economic house for a long time to come (a view shared, incidentally, by Barack Obama, who loves to say “it’s time to focus on nation-building at home”). The U.S. share of global defense spending has soared to more than a third of the total, while the American economy has dropped in size to one-quarter of global GDP; America spends more in total than the next seven largest countries combined: China, Saudi Arabia, Russia, Britain, India, France and Japan. And to what end exactly?
