Geneticists acknowledge that there’s really only one “race”, in terms of “species” of people since people of all “races” are capable of producing fertile offspring with those of all other “races”. It may be of interest to know, for example, that northern Chinese share more DNA with Caucasians than they do with southern Chinese, even though we think of all Chinese as being of the same “race”.
Nevertheless, people are not immune to environmental “survival strategies”. So, for example, white people more readily absorb sunlight through skin, and are better able to manufacture Vitamin D in an environment in which there is less sunlight than in other areas. Those who can’t, die out, and after awhile everybody in relatively sunless places are light skinned. On the other hand, in areas where there’s a lot of sunlight all the time, protection in the form of more skin melanin is needed.
This seems to work even fairly short term. Indo-Europeans are the only people on earth most of whom retain lactose tolerance into adulthood. Indo-Europeans spent thousands of years on the Eurasian steppes as herders. out there, there’s not much of anything to eat except animal products; meat and milk. If you couldn’t digest milk or milk products, you died, so lactose tolerance became the dominant trait over a fairly short period of time, relatively speaking. In places where herding was not the only source of food, lactose tolerance was not so important, and lactose intolerant people survived readily, passing on their genes.
Certainly, in that sense, almost anyone could believe in “evolution”, and ought to, otherwise things like skin color and lactose tolerance are inexplicable. After all, if baby looks like grandpa and not some guy halfway across the world, that’s an inherited or “evolutionary” phenomenon. If all blonde people married only blonde people for generations, all their offspring would be blonde. We see this sort of “evolution” all the time.
(yes I know, it’s not the same thing as “men came from monkeys”, which i’m not addressing in this post)