It is possible that early humans diverged from other primates when they began eating meat. This meat was likely burnt from frequent lightning strikes on the African savanna. They did not even have to know how start a fire, only how to keep one going. Eating cooked meat gave a much higher caloric intake and human brains grew significantly larger than their primate cousins. As humans developed a taste for meat and a source of constant fire at their campsites, they had to work together socially....
