[4rtemis]

I feel like biological populations can be reduced down to one individual and up to all of humanity. You can attempt to make logical decisions about where to draw these lines in between, but you'll get overlapping populations at different levels given different traits. These epigenetic flags are not dissimilar to genetic traits in that no one, nor group of them unequivocally define an individual into a biological group except if that group is "organisms that express this trait". It definitely won't square cleanly with our social macro-constructions around "race".