I haven't read the papers in detail, but can someone explain how genetics can be used to trace spread of languages? For context, you don't need population movements for a language to spread (it is similar to religion). See this article for a logical explanation: https://medium.com/incerto/a-few-things-we-dont-quite-get-ab...
Well, you can't. In this case I believe they're already pretty confident about who the PIE speaking people are (the "Yanmaya") and this study is about tracking down where they originally lived. And they have shown that they mostly replaced the previous European population rather than transferring the languages to them. David Reich is aggressive about these genetics results though. IIRC I read a NYT story once where h…
Primarily the male population. Genetically much higher proportion of the female population survived.
Of course that’s an exaggeration as well. In much of Southern Europe and other areas the replacement was far from full.