[hallole]

Yes, but Jedberg makes it sound as though -- given that only a small fraction of the world's population lives in the USA -- the country has little chance of succeeding if it is to go without immigrants. I disagree, and an extreme example I could offer as a counterpoint is Japan: tiny population (relatively), yet outsized performance.

[matwood]

Japan has struggled economically for decades. One of the fixes being put forth is to greatly increase immigration.