It will age very well. Successful countries that behave otherwise don't stay successful for that long. If a country doesn't put its interests first, who will?
Broadly controlling human migration at the border is a relatively recent thing (as in, just over a century). 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.
So it's not at all a given that the current system with tightly regulated borders, visas, conditions of residence etc will still be in place in 100 years.
>Broadly controlling human migration at the border is a relatively recent thing (as in, just over a century).
When prior to industrialization would mass migration (especially of another ethnic group) have been seen by the current inhabitants as anything other than an invasion?
>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 immigration restrictions of the late 19th/early 20th century were a reaction to immigration numbers having risen beyond the point that the current inhabitants were comfortable with. Yes, controls were lax before then but that was a reflection of 1) the relatively low degree of conflict over resources (a result of industrialization), 2) the similarity of ethnicity/culture between the current inhabitants and the immigrants (they were predominantly Christians of European ancestry -- Chinese immigration was not viewed so favorably), and 3) comparatively low numbers of immigrants before ~1870, and especially before 1850.
> 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.
So it's not at all a given that the current system with tightly regulated borders, visas, conditions of residence etc will still be in place in 100 years.