Comment Genetic diversity (Score 1) 637
His argument reeks nostalgic, i.e. a return to the Greek philosophical ways. And I would guess he started off with a vague hypothesis and found facts to support his claim. Some arguments say agriculture and plentiful food allowed brains to get larger... go figure.
Whatever the conclusion, I do think that mutations have allowed for a greater genetic diversity of brain types, and that is a good thing.