an example of how immigration (cheap labor) can stymie technological development (http://www.wsj.com/articles/the-thorny-economics-of-illegal-immigration-1454984443 … $):pic.twitter.com/qnFK14xRzv
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@AGiantDuck wars/crises might exert *some* selection, but they're hardly necessary for evolution. again: selection, migration, drift.
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