From Balloon Juice, some tweets on why diversity is important:

8/People from diverse backgrounds are constantly struggling to understand each other better, to take each other’s divergent family histories and cultural backgrounds into account, in order to get along at work, at school, in marriages, etc.

That effort strengthens us.

— Noah Smith (@Noahpinion) September 9, 2018

9/Our institutions, too — schools, companies, etc. - are forced to take more of an account of people’s backgrounds than they would if they could simply assume that everyone came from the same background.

Diversity means we can’t expect or force people to fall in line.

— Noah Smith (@Noahpinion) September 9, 2018

13/But if we succeed - if we CONTINUE to succeed - then I believe the payoff will be unique and unmatched.

A country with institutions strong enough not to have to rely on homogeneity will be the strongest country imaginable.

The America experiment must continue.

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— Noah Smith (@Noahpinion) September 9, 2018