See also: "Discussion with Chris Knight on the origins of humanity, part 1".

In this second instalment of the discussion with Chris Knight at the ICC's 19th International Congress, we examine various aspects of human evolution, and the theories that have aimed to explain it. In particuler, the discussion looks at the role of the aquatic environment - lakeside, riverside, or sea shore - in the evolution of humanity, at the problems posed in explaining the rapid growth in human brain size, and at the evolution of the hunter-gatherer lifestyle.