For serious discussion of the controversies, approaches and enigmas surrounding the origins and development of the human species and of human civilization. (NB: for more ‘out there’ posts we point you in the direction of the ‘Paranormal & Supernatural
’ Message Board).
The "concept" of black haired people? Or the reality of black haired people? There are all kinds of concepts that have nothing corresponding to them, or, to put it differently, that apply to nothing at all, to no individual thing at all.
That said, it goes without saying that the concept of black haired people does apply to any number of human beings, including, incidentally, white people.