I look at the desert people who dress in robes and hats and shit that covers them almost completely from the sun, they seem to tend to be lighter skinned than most africans who seem to not understand the most basics of clothing themselves. Then we got whitey living in temperate climates that go from hot as fuck to freezing cold, we tend to cover ourselves and protect ourselves from sun in other ways like sunscreen, hats, normal clothes, and then insulate ourselves against the cold. But we do have issues with vitamin D deficiency and seasonal depression. But we adapt. We have tanning beds, we have sunscreen that helps prevent cancer but still lets us get enough sun to be healthy. Im just writing thoughts here to, Im not positive on any of this, just my speculation. It can be very difficult to find honest science that displays differences between the races