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I didn't watch the whole video.... where did he get $90 trillion in gains from?
AFAIK, the entire world economy is less than $90 trillion USD in real terms...
He says wide open borders will dramatically increase the world's productivity.
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That does make it a different point than what you were asking for. A net benefit isn't the same as a mutual benefit.
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I think ultimately it would become a mutual benefit if the entire planet was able to produce more. Personally culture isn't a big deal to me, short of extreme differences.
Basically any culture that doesn't want to infringe on my rights is fine
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There's an economist joke that the best foreign aid is luggage.
Moving from a tyrannical shithole to America will generally increase individual productivity by an order of magnitude.
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That makes a lot of sense especially considering how little of the aid actually helps anyone.
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