Q: Curt: “When did light coloring develop? Was it agrarian diet?”– 1. White ski

–Q: Curt: “When did light coloring develop? Was it agrarian diet?”–

1. White skin evolved around 19,000 years ago likely in the ancestral north eurasians (lost population). 2. Counter clockwise migration pressure across eurasia caused westward distribution.
3. Cheddar man was ‘ruddy’ not dark as shown in the model – repeatedly falsified but persists in the discourse.
4. Neotenic Adaptation is not just diet, and it’s not just melanin but it is natal biochemistry.
5. Light Skin, Light hair, Light Eyes are highly neotenous.
6. Neoteny is the principle direction of all human evolution – domestication syndrome trading agency for impulse and calm for aggression, by delay of and reduction of the depth of sexual maturity (still visible in race differences in gestation, maturation, and dept of maturation).
7. So lightness in general, just like gracility, spread by selection pressure in favor of neoteny particularly in women, and particularly given the asymmetric reproduction of women vs men.
8. Agrarians (anatolian farmers) are darker in color than europeans. So the migration of light coloring was westward from the north of the caucuses, and especially from the northeastern ancestral north eurasians and northeastern europeans – not westward from the south of the caucuses.
9. So most neotenous to least: east asians, west europeans > caucasians > south eurasians (north african, levantine, iranic, hindustani people) > afro-asiatics (arabs) > modern africans > old africans (San people)
10. Coloring is determined by a complex interaction (polygenetic) but we do know the primary genes:
– Eyes: OCA2 (pigment) and HERC2(lighter)
– Skin: MC1R (melanocortin 1) as well as LSC245 and SLC45A2, in europeans.
– Hair: MC1R (again) and TYRP1 (both skin and hair). Ergo: agrarian impact on skin color was minor and late.

This is the correct answer.