White flight for example would be the result of years of development in the harsh northern climates where conflict would lead to the destruction of what little you had (things to keep you warm specifically) which would result in you freezing to death. The African populations on the other hand, lived in a warm environment with plenty of food on demand and therefor the species was better suited for conflict because they could easily rebuild their survival necessities.
Well the Bible outlines the origin of the various peoples via the lines of Shem, Japhet and Ham, and their sons, respectively:
Elam, Asshur, Arphaxad, Lud, Aram and Japhet's Gomer, Magog, Madai, Javan, Tubal, Meshech, Tiras, and the subsequent generations.
Ham generated Cush, Mizraim, Phut and Canaan.
Given the actual age of the Earth, microevolution for the Homo sapiens' various sub-categories is doubtful, as it should've been a relatively fast phenomenon, in the order of the millennia, and historiographically observable.
For instance, Alexander the Great's army alleged demographical contributions to the northern Indian populations should be undetectable after 2300 years or so, and indigenous populations in North America and Siberia should have "microevolved" to resemble their caucasian counterparts.
Let alone the racial differences do not involve merely skin colour, which is actually possibly one of the least striking differences, relatively to bone structure, cranium, genetics, etc.
Now, before I get the standard "you a idjit study a book" response, I'm not dismissing the whole evolutionary field on the basis of these raw and simple minded observations.
On the contrary, I'm saying it is so complex, and inaccessible if not to the elect few (as often is the case with sciences), what the lowly researchers let alone "amateurs" get is such an oversimplified version of the facts they might very well be steered in a particular direction on purpose.
Data is horse with many saddles.