Since 2018 U.S. stocks have returned 9.59% per year (I checked with Portfolio Visualizer) and international stocks have returns 1.83%. I don't see how that supports the idea that economies are very interconnected and investing outside the country can't produce a large return differential.
We also haven't had a official recession in the U.S. over that time period, I believe, so the topic of recession seems like a red herring.
We also haven't had a official recession in the U.S. over that time period, I believe, so the topic of recession seems like a red herring.