Does there exist

[james_davis_nicoll]

An SF novel whose setting knowingly includes a global example of a Stage Five society?

[not interested in examples where death rates exceed birth rates for reasons due to calamities like war, famine, plague and the like; those aren't really Stage Five societies]

Comments

[traviswells.livejournal.com]

The webcomic Nine Planets Without Intelligent Life has the same sort of setting. Humans just apathied themselves to extinction after building sentient robots, and now the robots are trying to carry on without them.