So the Corded Ware culture are mainly the ancestors of almost all Eastern European people, since Eastern Europeans are largely R1a, while Western Europeans are R1b? I also read the Proto-Corded Ware language was the originator of Proto-Germanic and Proto-Balto-Slavic. Then from which waves of Yamnaya immigrants did Proto-Italic, Proto-Celtic, Proto-Greek, Proto-Albanian languages originate from, people who came after the Corded Ware or before them?

