Something commonly raised in favor of a high (animal) fat diet in paleolithic humans is the notion that this was required and/or precipitated the increase in human brain size. He seems to be saying this is not so much the case as is often cited. (Around the 9 minute mark). This is a huge point!! Dominy does not come across as some vegan shill, that's for sure. He pretty much comes out and says that meat eating is a no-brainer -- we're not herbivores -- but favors a higher percentage of plant foods likely comprising our ancestral diet. Worth a watch/listen.