The two principal component analyses below are the most useful and straightforward that I’ve ever come across. They’re very easy to understand for normal people who don’t know anything about genetics. The first is a PCA of the entire human species, and the second only features Caucasoids (aka West Eurasians). I made them into infographic type images, and included some extra labels, maps, and the sources. I haven’t edited the PCAs other than fixing the ratio on the global humanity PCA, because the ratio used in the study is misleading.
I made three versions, one with both PCAs on one image, and two featuring only one PCA each.
PCA of modern humans worldwide
PCA of West Eurasians only
You should have added South asians into the Caucasian graph. It looks like a triangle from the ones I did on Genoplot
South Asians aren’t really Caucasian, they’re a mixed population with Caucasoid, Mongoloid, and Australoid ancestry and ethnic groups.
Interesting note, if anyone is coming back to this post:
The first PCA shows that despite a large amount of genetic diversity among Sub Saharan Africans, they don’t differ very much from each other in the ways that we are different from them.
That’s partially due to the lack of dimensions represented in the PCA. They’re best viewed in 3D but obviously you can only capture 2D on a flat image. Here’s one from a different “angle” that shows diversity in Africa. South African / Khoisan are a completely different race to other Africans.