Not too be too glib but this reminds me of one of my pet truisms:
"If things were different, then things would be different."
Japan is way more insular than the US [1]. You can theorize about what might happen if we didn't have net immigration but it's largely irrelevant because we do.
"If things were different, then things would be different."
Japan is way more insular than the US [1]. You can theorize about what might happen if we didn't have net immigration but it's largely irrelevant because we do.
[1]: https://www.nytimes.com/2003/07/24/world/insular-japan-needs...