So what did Neaderthal and Cromanian primarialy eat during their development out of the last Ice Age? Snow cones, or a very high protein diet due to the climate? And the Neolithic hunters following the land bridge into NW america after the animal herds? Or the ansestors of all the peoples of Asiatic Russia, Mongolia, and Indo Europe? Meat eaters due to the climate.
Africa had an easy climatic weather cycle during the Neolithic era. The ice bound areas did not. The protein and intelligence theory have been argued over. But it does seem to look like the descendants of high protein eaters created our modern technological society. I guess Mastadon were good for something after all.