You seem very concerned that "The capitalist myth about the origin of money has done a lot of damage". I'm not sure why it matters to anyone whether money originated from people recording debts or from people bartering. Either way a medium of exchange was very useful. A medium of exchange is useful whether you are a capitalist or not. Even Russia and China while killing capitalists and millions of other people for the sake of communism still used the ruble and the renminbi. And money goes way back in time. When you talk about capitalism creating myths, do you mean 3000 years ago? I've never studied history but I do know the use of shekels goes at least that far.
But all that is beside the point. People are naturally selfish, greedy, and power-hungry. Whether it is sheep, money, cars, rank, influence, or whatever, people by nature seek advantage over each other. Creating a large-scale society of diverse peoples while ignoring those human traits simply doesn't work. In Star Trek Roddenberry claims to that humans solved those issues, but never says how.