re: Is there any historical evidence of diversity working out?

quote:

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Up until the hart-celller inmmigration act in 1965, The United States was not very diverse, it was close to 90% white, and it was doing pretty well.

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Ah, but diversity DID make America great. The Indians were getting stuck in primitive living. They didn't know what to do. Then they said 'We need diversity. Let's see if we can find some white people.'
And the whites taught them to read and write. They only made one bad trade on culture. The Indians introduced whites to tobacco. The whites introduced them to alcohol.