Any good sci-fi out there that isn't apocalyptic, post-apocalyptic, or some form of capitalism in the future? You know, some kind of portrayal of a better world is possible? Star Trek is an obvious one but I'm scratching my head trying to think of other examples.
Part of me thinks the reason there are so few is that it's difficult to create a meaningful conflict/story hook in a setting where the primary motivator(s) that create conflict are removed via post-scarcity. Star Trek has to basically inject old-world style conflict in a society that has transcended scarcity and racial/reactionary tensions, and these issues are caused by other alien races or by societies living on the fringes of civilization.