A City And Ravens
These posts show that:
sf is not just about the future because it is about everything;
when sf is about the future, it is not just about one kind of future.
Speculative futures can be high tech or post-technological. There can be an urbanized Earth and a cosmic mind or ruined cities and struggling survivors; utopias, dystopias or business as usual scenarios. And Poul Anderson covered every possibility. However, his optimal state of humanity is dynamic and diverse, therefore not "Utopian" if this is taken to mean placidity or uniformity.