Earlier quoted context omitted.
I mean, if you think you can get max diversity of ideas without also pulling people from different cultures, you’ve been around way too many white men.
Diversity of ideas (and good ideas specifically) comes from education, reading a lot, listening to smart people, thinking, and maybe a bit from genetics. You're concentrating too much on the skin color. We should push smart people, we should create the culture of smart, so people want to become smart.
Concrete example, the number of times Americans assume I have a SSN. Or, on a trip to Kenya, my host assumed I’d know how to say grace before a meal. Or how I came to Berlin and assumed that finding a flat would be as easy as it was in the UK.
Edit: Just realised one obvious group I blindly forgot — poor people have very different experiences than rich people. $2/day absolute poverty, $10/day “you’re doing well by Kenyan standards”, $100/day Harlem average (chosen because it’s what non-Americans think of as a poor bit of America). All different from each other, all different lives from us, even if we don’t call ourselves rich.