Where the money comes from!

This map from the Washington Post shows that half of the GDP of the nation is created in a few, large cities.

According to the Brookings Institution:

Metropolitan areas nationwide boast disproportionate shares of the assets that will drive the next wave of U.S. economic growth. With 84 percent of the nation’s population, all 366 metropolitan areas together produce 85 percent of U.S. exports, and are home to 86 percent of its lower-carbon commuters (those not driving alone to work), 89 percent of working-age people with a post-secondary degree, and 93 percent of individuals employed in science and engineering occupations.