I think we can see change is already underway, if you compare skin tones of those with African heritage in northern lands who are several generations removed, to those who are born and live in equatorial regions like Africa or Haiti. Intermarriage with lighter complected mates plays a pivotal role in this evolutionary process.
Because we all descended from Africa and spread out over the earth, with evolution will black and Asian people who live in Europe eventually become white because of the climate?
Could also be other way?
Actually, that theory is in question.
We know certain hominids came from Africa ... But perhaps not all of them. And we know there was interbreeding, so there are still traces of those other hominids in some modern DNA.