As far as I understand about the anthropological evidence (which isn’t much), there was a big fuss back in the day about neanderthals being the source of red hair, then there were a bunch of counterarguments, and we’ve sort of moderated to the opinion that it evolved during the Holocene. There are also a bunch of extremists trying to convince everyone that neanderthals were black, as well as being psychotic rapey faggot cannibal proto-Jewish supremacists, because that’s what people do on the internet.
So far as I can tell, all the mythical evidence points to neanderthals having had red hair. Gingers are associated with shamanistic characteristics in art and to a lesser extent in real life, particularly a sort of animistic cunning which mostly causes trouble but is occasionally so useful for getting out of a jam that we put up with them. I don’t have to know anything about the Frozen movies to guess that the redhead is the more impulsive of the two princesses. For more such associations, take a quick look at the wiki: https://en.wikipedia.org/wiki/Red_hair#Culture
I also note that bit that Dutton keeps bringing up lately, which is that there’s a correlation between sickliness and gingerness up until a certain point, then you hit a sharp inflection point where the most ginger people are the healthiest of all. This is reminiscent of what Tex said about sapiens and neanderthal genes being “like oil and water” (and is analogous to the inflection point between GFP/testosterone/autism and intelligence at around the 130 mark). Then of course there’s the whole vitamin D thing, which only makes sense in the same low-light conditions that would produce those giant orbits they had. And last, nobody wants to have sex with gingers (of either gender, but especially males) so that there’s a huge individual reproductive deficit, which would beg the question if red hair isn’t somehow group selected.
Basically, if you think it wasn’t from neanderthals you have to assume red hair was just a big accident, which is funny for saying ironically but “j/k but no srsly” AMOGing doesn’t make for great science. Claiming that something is neither individually selected nor group selected (and frankly is just a giant, multi-millennia mistake of birth that should have been exterminated sooner) sounds more like devaluing narcissism than sociobiological consilience to me. But hey, maybe I’m biased here. I just trust me more than I trust all you people because, frankly, I’ve met some of you and have not been terribly impressed with your ability to maintain a clinical detachment in racial matters. And one of my observations that informs this opinion is that when people say other people do, say or simply ARE something “for no reason”, it’s because there’s a reason they desperately want everyone to ignore.
Based on the recent track record of anthropology, especially with respect to European origins, I’m going with the unanimous collective unconscious on this one. Red hair is probably from neanderthals.