Hunting could be the foundation of human society. One man working alone with stone age technology would be relegated to trapping and fishing, but a group working together can go hunting. In order to hunt successfully, Grug needs to know what Ug is going to do and vice versa. That entails communication and hierarchy. More hunters with more complex organisation can catch more an bigger animals more reliably, incentivising even more cooperation. Those who could do it ate better and could support more children over thousands of years. <|endoftext|> 