It's a great comment thank you. The part about the changes that would have enabled us to scale as society is really brilliant. I've read a bit about this in historian theories but the focus is often very material (probably because that's what you have evidence of).

I've always been in awe at the (absolutely crazy if you ask me) concept of money. The fact that we accept to give up possessions or time in exchange for the promise that anyone in the future will provide something equivalent because we just show some token/proof (which in itself are intrinsically valueless: sticks, stones, minerals, papers, now bits...).

We've been educated to be a bit suspicious and maybe show a slight contempt for it, probably to avoid being inelegant and also particularly because a lot of big owner of it are seen as not necessarily deserving of it.

But from an evolutionary perspective it's absolutely stupefying. And at its core its extremely positive. It shows absolute trust in our peers. It's probably one of the few behavior that really binds us together.

One could argue that it's the actually one trait that really distinguish us from other animals.