Just wondering if there has been any mention of this topic yet? I guess I am specifically concerned with Canada, Australia and New Zealand. I found in Vicky 1 that these countries never really got historic levels of immigration, especially after they became dominions. They weren't Democracies and didn't have the USA tag, so they would always lose out to the Americans.
I know the USA should get many more immigrants (about 10x that of Canada), but I hated seeing provinces that had only or a majority of aboriginals (when this was historically not the case).