When present day European genetics was formed during the beginning of the Bronze Age 5,000 years ago it was a result of migrating Yamnaya pastoralists from the Caspian steppe encountering Stone Age farmers in northern and eastern Europe. A grand synthesis article argues that young Yamnaya warriors belonging to raiding parties married local Stone Age women, settling and adopting a more agrarian lifestyle. During this process, where the Corded Ware Culture was formed, a new Proto-Germanic dialect appeared.