This is the more correct answer. It's also answers why developed nations became developed and undeveloped nations did not. The west advanced just fine without "brain drain" in the centuries prior.
That being said, I wouldn't use the US as some bastion of progress. Technically, we haven't progressed much since the 70s? 80s? outside of GDP going up, but that's just a number on a chart. Most of us today could go back to the 70s and live not much different than now (compared to the any earlier decade). It's mostly a side effect of being the world's reserve currency.
That being said, I wouldn't use the US as some bastion of progress. Technically, we haven't progressed much since the 70s? 80s? outside of GDP going up, but that's just a number on a chart. Most of us today could go back to the 70s and live not much different than now (compared to the any earlier decade). It's mostly a side effect of being the world's reserve currency.