Interesting but ultimately disappointing.
Le Guin posits a society of genetically engineered humans who are hermaphroditic — being sexless at most times, but periodically entering kemmer
where they may express either male or female attributes.
You'd think that she could make a great deal of this, but the main narrator is an outsider, who can't help but filter everything he sees through his masculine point-of-view. The only lessons I take from the story are that no matter how stable a society like this could be, it would eventually fail; and that without "men" there's no way we'll ever found an interstellar civilization.