Aderall always bitching against diversity.

I understand where he's coming from, but the truth is that people will never reach an agreement about "how much" diverse or homogeneous a society must be.

Therefore the guiding principle must always be respect of free will. Those who want to live in diversity will do so, and those who don't just won't. Simple as.

That is a perfect society, a perfect nation, a perfect country. Respect of free will as the supreme principle of morality.