How Science and Genetics are Reshaping the Race Debate of the 21st Century - Science in the News

Human populations do roughly cluster into geographical regions. However, variation between different regions is small, thus blurring the lines between populations. Furthermore, variation within a single region is large, and there is no uniform identity.
https://sitn.hms.harvard.edu/flash/2017/science-genetics-reshaping-race-debate-21st-century/

— Steve Smith