Among the identified human subgroups, some would probably be subspecies of the same species as modern humans (Denisovans, neanderthals, and a few others) if the

Among the identified human subgroups, some would probably be subspecies of the same species as modern humans (Denisovans, neanderthals, and a few others) if there hadn't been a tendency to assign extinct human groups (or even individual specimens) as distinct species on scant evidence.