But anyway one point he makes that really stuck with me, is that in a hunter gatherer society, you might get a tribe leader or chief or something. But if you dont like what they're doing, you can just leave and be a hunter gatherer somewhere else. No one is depending on any centralised place for food. So you can get complex social structures if thats what everyone wants, but hierarchies are difficult to maintain by force. People will just quit if they dont like it.
Whereas in an agricultural society, you get specialisation of skills which helps towards the sort of thing we now think of as 'progress' but you can also have hierarchies enforced by force because someone or some subgroup ends up in charge of the food and can lock it away, and peoples option to just leave and go and fend for themselves is less feasible and so they get stuck being subjects of some ruler.
TLDR: You dont have to think of hunter gatherer societies as simple or backward. But they are less likely to have deep hierarchies and specialisation