Delvo
Дэлво Δε&#
It sounds like just a sloppy way of expressing the fact that if you're visibly mixed, like Obama is, then you're clearly not a part of the majority, so you and others are likely to culturally think of you as a part of the nearest minority.
Also, the caucasoids who dominate northern Africa and the Middle East have been there longer than the time it took for the caucasoids of Europe, particularly northern Europe, to get as light as they are, so their color can safely be considered to have had time to adapt to the northern African & Middle Eastern environment. And they're even lighter than the Khoi-San.
Overall, although a certain part of Africa does lead to evolution of extremely dark, essentially black, skin, most of it seems to lead to medium/dark brownish skin instead, so that's most likely what the universal ancestors had.
Black people originally come from a fairly small pocket of Africa right on the equator. They only started expanding from there a few thousand years ago, and about half of that expansion, particularly southward and thus farther from the equator, occurred in a second wave hardly over half a thousand years ago. Their present territory's previous inhabitants were presumably relatives of the Khoi and San, which are now relatively small groups of non-black native Africans living in areas where the relatively recent black immigrants' agriculture wouldn't work. They were and are native to Africa, but not the part of it that's right on the equator, and, among other physical differences, they aren't as dark. They're more like the shade of someone who's part white but about three fourths or four fifths black (which is about average in the American so-called "black" population, culturally identified that way because anything that's not white is still a minority).Fair enough, thanks for correcting me. I imagine that those people would still have a dark skin colour though, since the climate would be pretty similar in terms of temperature/sunlight. Or maybe not, I'm really not sure.
Also, the caucasoids who dominate northern Africa and the Middle East have been there longer than the time it took for the caucasoids of Europe, particularly northern Europe, to get as light as they are, so their color can safely be considered to have had time to adapt to the northern African & Middle Eastern environment. And they're even lighter than the Khoi-San.
Overall, although a certain part of Africa does lead to evolution of extremely dark, essentially black, skin, most of it seems to lead to medium/dark brownish skin instead, so that's most likely what the universal ancestors had.