New Jack Cross SF: In 3010, humanoids live underground like termites...
What if there were only 50 people left - people who had increased their lifespan to 300+ years?
In the year 3010, this gerontocracy is preserved at the physical age of eighty. The privileged elders are maintained by robots and a eugenically streamed, short-lifespan humanoid underclass.
Mark5, a sub-class Sex Cadet streamed to service women elders, will do anything to survive as he navigates his way through the carnage and collapsing infrastructure of earth's final brutal civilization.