In my view it's about the interface. Any utopian community must interface with the rest of the currently-not-utopian world. I suspect the utopian aspect can onl

In my view it's about the interface. Any utopian community must interface with the rest of the currently-not-utopian world. I suspect the utopian aspect can only be maintained if that interface is very small and restricted. Otherwise the property-based wider society will grow to dominate and maximally exploit the utopia, as is its nature. This concept is explored in The Dispossessed by Ursula K. Le Guin.