90% of Europeans come from R1b and R1a haplogroup, as I listed above, they replaced the Neolithic Farmers from Anatolia that had colonized starting in Turkey, the Mediterranean shoreline as far as the Iberian Peninsula, all of Europe and the British Isles . A Neolithic farmer was no match for Bronze Age people that used domesticated horses to pull carts and ride, with metal weapons.
The R1b Bell Beakers are known for killing off all the males they conquered and assimilating the females.. The R1a Corded Ware assimilated some of the Bell Beaker females.