I read over that article, but where does it discuss extermination? I see statements like this: Professor Anthony suggests that the spread of Yamnaya culture m

I read over that article, but where does it discuss extermination? I see statements like this: Professor Anthony suggests that the spread of Yamnaya culture may have been facilitated by a kind of protection racket, in which the Yamnaya warriors would offer settled communities protection from gang activity, in exchange for their vassalage. and Did this conquest take the form of a single, unstoppable wave? Certainly not. This was a process effected in a piecemeal fashion, over the course of millennia... The article mentions a massive influx into the gene pool but I would think this does not rule out, say, subjugation of an existing population and interbreeding.