The Caucasoid type of humanity is believed to have resulted from an original Afrocoid stock. Around 40,000 B.C., the Grimaldian Africoids inhabited Southwestern Eurasia (Russia). The Caucasoid type is said to have resulted from a phenomenon associated with Vitamin D metabolism.
One of the most vital functions of the skin is the production of Vitamin D from the biochemical substance called 7-dehydrocholesterol, through interaction with the ultraviolet light of the sun. This is a critical process for Vitamin D, since it is the vitamin that is absolutely necessary for the proper mineralization of the bones.
In the ice-age environment, whitened skin out of an original Africoid stock was better adapted to Vitamin D production. The development of this new human stock was made possible by prolonged isolation from other human groups, leading to inbreeding within the albinoid group, which continually heightened the albinoid characteristics.
Melanized skin (skin with dark pigmentation) in a tropical climate is necessary to protect the cells from the ultraviolet rays of the sun, and from the deadly effects of skin cancer. This also means that most of the ultraviolet light that would normally go into producing Vitamin D, is screened out. However, because of the intensity of the tropical sun, enough ultraviolet light penetrates the melanin barrier to produce a sufficient amount of Vitamin D for the bones.
In a frigid northern climate, with many sunless days, and shorter hours of daylight, melanized (dark or black) skin becomes a liability. In a colder climate, the amount of sunlight penetrating melanized skin for the production of Vitamin D is drastically reduced.
The fossil remains of these ancient Grimaldi Africans were discovered in a cave near Mentone, France, layers below the Cro-Magnon man, in an area called Eurasia. These were the same small Africans known as the Twa (also called Pygmies), whose descendants are in Southern Africa today, best known as the Hottentot. Other African fossil remains of a similar age have been found in Brittany, Switzerland, Central Europe, and Bulgaria.