>I'm pretty sure that's false. What is true is that africans exhibit a great amount of genetic diversity, i.e. two africans will typically be more genetically different than two europeans. But the genetic distance between either of those two africans and either of those two europeans will still be even greater.

I didn't say Africans and Europeans, I said black people and white people.

A black person from Africa and a black person from elsewhere are considered the same race because of their visual similarities, regardless of their background. That's the social construct.

>A thing being a social construct doesn't mean it doesn't describe an underlying reality

It can be inaccurate enough that it isn't useful, though.