The story moves quickly through times when there were no disruptions. Corom “did that which was good,” and his son Kish becomes king. No information whatsoever is provided about Kish. All that we know is that he begets Lib.
There was an increase of people in the time of Lib. The descriptions here show the people of Jared spreading across the land, and, specifically, hunting game. Lib is mentioned as a great hunter, and that leads to the description of the land southward as a place where Lib the hunter might get game.