If you want a single number to capture America’s economic stature, here it is: This year, the U.S. will account for 26.3% of the global gross domestic product, the highest in almost two decades. That’s based on the latest projections from the International Monetary Fund. According to the IMF, Europe’s share of world GDP has dropped 1.4 percentage points since 2018, and Japan’s by 2.1 points. The U.S. share, by contrast, is up 2.3 points.