[sedachv]

> Taking US as an example where this sort of thing is a controversial political topic today - in most of the 19th century, if you had access to any means of transportation necessary to get there (including walking across the border from, say, Mexico or Canada), that was all you needed to become a legal resident. Yet the country did just fine.

The great land border lockdown between the United States and Canada or Mexico really started after September 11, 2001. The current border controls are extremely excessive by comparison, and the current US president's proposals are completely insane by 20th century standards. Many people born in the 1990s do not realize just how unusual the current border lock-down situation is.

To add an anecdote, the most unusual Canada/US immigration story I know is an acquaintance, US citizen by birth, who had illegally immigrated to Canada and was an undocumented under-the-table cash worker for almost a decade by the time I met him in 2010. One of his American grandparents originally came from Canada by literally swimming across a lake in the 1930s to immigrate to the United States.