Comments by "" (@HigherPlanes) on "Meat and fire: Main reasons for evolution of modern humans | Richard Wrangham and Lex Fridman" video.
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@davidatkinson5858 Yeah, maybe it did increase brain size, but I personally doubt that was the case. Think about modern apes, while they do eat meat on occasion, their main diet is fruit based...three bananas equals roughly to about 300 calories, which btw is more than enough to fuel a modern human brain for a day.
This is a an assumption, but I take it there there was plenty of fruit available 2 million years ago in the lush African rainforest. But apes don't just eat three bananas, they forage all day long...so I don't know the numbers, but I'm sure they're getting in excess of 1,000 calories a day. A cooked steak gives you about 600 calories on average. So you see where I'm going here? The caloric intake from fruit/greens/raw meat vs cooked meats isn't vast enough to account for the increase in brain size, keeping in mind how many calories a modern brain is required to function effectively.
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