At any rate this is a marvelous novel. Science fiction, but no weird aliens or ray-gun duels. A very persuasive description of what a functioning anarchist society would look like, and all manner of included problems in such a society. You could take this as a socialist society as well, after the state had withered away. There is a different socialist planet in the story but it hardly figures in the action. The real tension is between the anarchist planet and its capitalist ("propertarian") rival. Le Guin writes as a partisan but not an uncritical advocate.
I usually read science fiction for escape, but for good or for ill there is no escape in Le Guin's novel. It takes you right into all the problems we usually talk about, as well as those we could encounter if we got everything we wanted.