Subspecies definitions can be rather arbitrary in general, and don't fit well to a species with the technology of humans. 1000 years ago you probably could hav

Subspecies definitions can be rather arbitrary in general, and don't fit well to a species with the technology of humans. 1000 years ago you probably could have said that indigenous subsaharan Africans and Americans are different subspecies of homo sapiens simply because one group has darker brown skin and lives in Africa, and one has lighter brown skin and lives in the Americas (phenotype difference + range difference is all it takes). But today the "native range" of every ethnic group is essentially global due to airplanes and immigration, so you'd probably say we're all one subspecies. But either way, the label "subspecies" conveys far less information than people sometimes assign it.