>>513372425
>>513373196
>>513373501
>>513377991
>>513378266
We all know Western Europeans are high-lactase, but mysteriously so are populations like the finns, estonians, and the entire northern fringe of the Balto-Slav coast. Despite these groups having little to no R1b.

It's also the case that the absolute palest people of europe (Irish, British, northwest Atlantic coast) just so happen to have the highest lactase in europe. We also see through Bell Beaker samples that the incidence of light pigment alleles, AS WELL as lactase alleles, were under positive selection after the bronze age.

The crux of it is this: pale skin is a lacto-vegetarian adaptation to get more vitamin D. Light eyes have partial influence on skin color, as all pigment genes are linked. lactose "tolerance" is a lacto-vegetarian adaptation to get more milk calories.

Yamnaya had darker skin and zero lactase--because they evolved in a resource rich environment (also the reason they were so tall). They did not need to get more vitamin D from the sun, as they had plenty from animal livers and fish. They did not need to digest lactose as they were well-fed in general. They were also very tall because of this fact.