I've never read this work, but am reasonably certain that from it's plot, I can figure out what it means.

In the primordial ooze, a crawling figure with a bag full of canned food making his way through the muck when crawling figure without bag of canned food begins tormenting him. After a long period of torture eventually the tables are turned and the first figure starts tormenting the other.

From this we find two types of people in the world. The oppressed and the privileged. Will not the oppressed slay the privileged, and the privileged after annihilation come back to torment the oppressed.