Technically, we could also try communism again.
Otherwise money is pretty much needed in a society where people may work in a factory or space center rather than spend their days farming. (And you can't really use bartering with science related stuff. Unless you go like "give me food and my team will build the anti-meteor laser.")
Communism might work, but it requires devoting such an incredible amount of ressources to micro-managing every transaction in the community that applying it worldwide would be less than ideal. (Maybe by using AI once we get there, but for now, not really)
Yeah, communism only really works on a small scale. Once you scale up past a million people or so, your society is too large for pure communism to ever work.
I don't think it can scale well past a hundred people, and that's pushing it. The only scale I've ever seen it work on effectively is on the scale of immediate family or other people who you inhabit the same dwelling place with.
Even in small new-agey communities where they share everything, the person leading it is often taking more than their share.
i dunno, i've got a lot of contacts with the vagrant gutter punk scene who say there are actual state sponsored anarchic villages in spain. it boils down to "help your neighbor, he'll help you out, and remember cookout at 1pm and 8 pm". it
can work, just not on a worldwide scale, or anything bigger than a village, to be honest
