On the non-necessity of evolving large brains:
It requires big brains and they in turn demand lots of protein, which, outside modern yuppie societies, generally means meat. As the late evolutionary paleontologist Jack Sepkoski used to say: “I see intelligence as just one of a variety of adaptations among tetrapods for survival. Running fast in a herd while being as dumb as shit, I think, is a very good adaptation for survival.”
(from a review of an interesting book.)


