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Climate refugees are going to be the big issue, not where to choose to move if you have that freedom. Any question of where to go has to somehow answer "What happens when everyone else who can tries to go there?"

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It seems inevitable that borders are going to harden over the coming decades, I can't see the politics unfolding in any other way.

I realize that this is the current trend in both Europe and the US, but I wonder if this is the best (realpolitik) strategy.

Not to mention the moral issues surrounding letting tens of millions suffer and die because we don't want to help people.

Can you really keep out tens of millions of people with a wall?

Can you really keep out tens of millions of people with a wall? Absolutely, if you're willing to enforce it. You may have to kill some of those people to do so, though. Which puts us right back at your second paragraph.

Europe and the US kept hundreds of thousands of Jewish refugees out of their countries during the Holocaust. We certainly can do it again, with just as shameful results.

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