I feel very safe in speculating there were widespread agrarian-pastoral communities virtually everywhere concurrent with and prior to the rise of the Big Boy river civilizations, and we just don't have records of the majority of them (but continue to keep discovering them decade on decade). The idea that humans across Eurasia and beyond were all living like Grug and then all of a sudden Sumer etc. just pop up the way they do is so immensely retarded and I have no idea how that even took off. <|endoftext|> 