u/FinanceDisastrous363

Hypothetically speaking, let's say that low fertility rates become a huge problem in the developed world. What's stopping the US from just opening its borders to Europe like in the early 1900s without any visas to stay and work, just check if the person has no criminal background, serious illnesses and approve them on the spot.

US already has a higher tfr than all of europe at about 1.60, only similar to France, however all other European countries boast lower rates putting them in a worse situation, so a good amount of people would migrate from countries like Germany, Italy, Spain, Poland, UK etc. In fact, I already know young people who idolize the US and would move there in the near future if it was as easy as moving within the EU.

Which makes me wonder, why are there so many posts from people in the US complaining about falling fertility rates when they could just use the worse economic state of Europe to open its borders and do the same thing it did over a hundred years ago, EU + UK already has roughly 520 million people, so even a small % migrating would fill in the gaps.