Kentucky makes enough bourbon to supply the entire world. And they could make a lot more if the demand called for it.
California is just one state (out of 50) as well but California's economy is big enough to put it well inside the Top 10 largest economies in the world if it were it's own country. Yet even California is mostly depopulated. While nearly 40 million people call California their home, the state is still mostly rural and could easily support one billion people. I've been to the Mojave desert and the northern forests and in both cases, I was so isolated from other humans that it was hard to imagine that in this very state were 40 million others.
Now California makes a lot of wine and could easily support the entire world with wine if the demand called for it. Take all the wine produced in Europe, Australia and South American and California could double that output without even stretching it's resources. And many of the wines produced in California outclass wine produced anywhere else in the world.
So my point is that the United States is massive, incredibly rich in resources, and yet has only realized a tiny fraction of its potential. The United States could easily support a population of 50 billion people within it's borders and still have plenty of rural space left over for recreation.
Also, it is only a matter of time before the provinces of Canada join our union. This will make us even more massive and powerful. And when the last Mexican crosses our borders, why we'll just take over that land as well and make a few states out of that.
L