Many lines of evidence suggest that human populations aren't distinct races. Why are we so similar even though adaptations to local conditions have occurred?

Question

Quizplus · Accepted Answer

The most likely reason that human populations aren't distinct races despite adaptations to local conditions is that members of different populations mate with each other, leading to genetic mixing and homogenization of the gene pool. This reduces the likelihood of genetic divergence and the development of distinct races.

Many Lines of Evidence Suggest That Human Populations Aren't Distinct