Fictional Anarchist and/or Communist Societies

[unspeakablehorror]

Does anyone know of any novels that take place in fictional anarchist and/or communist societies (besides Ursula K Le Guin or Star Trek, since I already know about those)? Doesn't have to be depicted as a utopia, but cannot be a dystopia. Should contain some sort of worldbuilding, but doesn't need to be sci-fi or fantasy or  contain any other speculative elements.