One of the tenets of modern diets is that modern humans are so much more intelligent/more technologically advanced than earlier peoples, so that modern, processed/cooked diets are the only alternative. This sort of theme is also replicated in von-Daenikenesque-like nonsense about ancient aliens creating past civilisations. This sort of info, above, does rather indicate that earlier types may even have been cleverer than modern peoples, just not having access to as advanced technology as we modern peoples have.