What feature of our species is most important for accounting for the fact that we cannot be divided into biologically meaningful racial or subspecies groups?

Question

Quizplus · Accepted Answer

The most important feature accounting for the inability to divide humans into biologically meaningful racial or subspecies groups is mobility and gene flow. This has allowed for a continuous exchange of genetic material across different populations, preventing the formation of distinct biological subgroups.

What Feature of Our Species Is Most Important for Accounting