R1a as outgroup

Davidski and David Anthony are having Mutual Words. Yamnaya is (mostly) R1b-Z2103, from the mightiest Kurgan to the shallowest grave. R1a is associated with Balts and Aryans today - lots of Greeks and Armenians as well. Especially -M417.

David Anthony, the best archaeologist of the mid-to-late 2000s, is learning genetics. He proposed that R1a was an underclass. Davidski counters that R1a is a minority population but not a caste population; they're about 1/10 top to bottom.

When R1a really starts mingling with R1b Indo-Europeans is not Yamnaya (much less Single-Grave) but Corded Ware.

Davidski rather undercuts that argument when he notes a socially disenfranchised Yamnaya clan. There may be a difference between "underclass" and "marginalised clan". I don't read what that is. Beyond that I'm stupid for asking what that is. Yay, Davidski.