alt Hacker NewsThe US had to much looser copyright terms until it tried to align with the Berne Convention. So there are minimum copyright terms that the US must comply by. US only joined the Berne Convention in 1989.
https://www.plagiarismtoday.com/2021/05/13/why-did-the-unite...
Excellent point. To which I point out: we have exited various agreements before.