I apologize for the small size of the type in this chart, but this was as big as I could make it on this format. This chart shows how the different racial groups split off, and which are most closely related to each other.
In case you can't read it, here it is in larger scale:
I was talking to a friend the other day and he said something which indicated that he thought that sub-Saharan Africans and Australian aborigines were related. I disabused him of that notion, and then found this chart as proof. The lower chart, which shows how closely related each group is to each other, is a little easier to understand. Sub-Saharan Africans bear a superficial resemblance to Australian aborigines and other Pacific Islanders, like the Melanesians. But Africans are in fact genetically further apart from aborigines and other Pacific Islanders than any other two major racial groups are.
This is an example of convergent evolution. If you live in the tropics, you're better off with dark skin so as to have more protection from the sun. And you're better off with wider nostrils so as to be able to take in more oxygen from the humid air. So both Australian aborigines and sub-Saharan Africans each separately evolved those traits.
The group actually most closely related to Africans are, surprisingly, non-European Caucasoids (Arabs, Georgians, Turks, etc.), closely followed by European Caucasoids.
The friend I was talking to is black. So, naturally, I informed him that it was high time for him to unite with his Caucasian brethren against those savage darkies from Australia.