It’s the norm with great apes and what few hunter gatherer societies we can observe. The vast majority of Europe also has male genes from only the Yamnaya imply

It’s the norm with great apes and what few hunter gatherer societies we can observe. The vast majority of Europe also has male genes from only the Yamnaya implying a massacre of all men and interbreeding with the women. I can’t imagine all of that was consensual.