Jean Manco has a new book out on the peopling of Europe, Ancestral Journeys.  The general picture is that Europeans arise from three main groups: the Mesolithic hunters (Hyperboreans),  Levantine farmers, and Indo-Europeans off the steppe.   It’s a decent synthesis of archaeological, linguistic, and genetic evidence. I suspect that her general thesis is in the right ball park:  surely not correct in every detail, but right about the double population replacement.

via Ancestral Journeys | West Hunter.