There are clear, genetic clusters corresponding with what we generally call races. The fact that some people, mostly from the former European colonies, won't p

There are clear, genetic clusters corresponding with what we generally call races. The fact that some people, mostly from the former European colonies, won't perfectly fit doesn't change that. The fact that this distinction is blurred, emphasized, or altered for political reasons doesn't change that. The fact that outward features, which are often used as proxy for the underlying genetics, can sometimes be misleading doesn't change that. Also, I don't think "almost all of us" or even most of us wouldn't fit into those clusters. Do you have a source? I understand that Obama is not exactly technically black; that legal, political or self-identified race may not align with those clusters or even known ancestry but it doesn't invalidate the concept. Just like there are people who are legally blind, and a subgroup who really can't see anything.