Not a geneticist, but there is considerable genetic distance between various human populations due to pretty significant temporal separation between the populat

Not a geneticist, but there is considerable genetic distance between various human populations due to pretty significant temporal separation between the populations of Sub-Saharan Africa, Eurasia, the Americas, and Oceania. https://jaymans.files.wordpress.com/2014/05/global-genetic-distances-map.jpg https://jaymans.files.wordpress.com/2014/05/global-genetic-d... There are also various degrees of admixture from other human species (Neanderthals, Denisovans, something similar to H. naledii) in different human populations which also contributes to our genetic diversity. https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Homo_sapiens_lineage.svg/1024px-Homo_sapiens_lineage.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Ho... Some argue that these factors and others would suggest classification of humans as multiple subspecies, if not separate species. It should also be noted that the well-known definition of a species as "organisms that can mate to produce fertile offspring" is not the standard for all geni and families.