I found the article from William James Sidis about how white ppl came about. . .

"An immense inland sea was formed during the Ice Age between Europe and Asia, leaving on its eastern side a large region enclosed by sea, mountains, and ice, and isolated from the rest of the earth for many thousands of years. Here were isolated a few human beings and a number of animals. An albino type became the standard human race in this region; this type is found as an occasional freak in all races, but, under this peculiar isolation, it became a white race. And, this freak race being isolated together with certain varieties of animals resulted in their taming the animals, and incidentally infected the people with those animals' diseases and parasites. In the course of generations, the white race gradually acquired a certain amount of immunity to those diseases, which, however, they always carried with them and which proved to be their greatest weapon in their fight against other races. When the great ice sheet retreated on the north and on the mountains, and the inland sea was drained, this original white men's country became desert, forcing both human beings and animals elsewhere, first south over the mountain passes (into India and Persia), then in a succession of waves westward into Europe, bringing a heavy crop of highly destructive diseases."