I speculate that early humans cooked the food for the same reason. How would I prove that, I don't know. But they were not thinking about the nutrient value or

I speculate that early humans cooked the food for the same reason. How would I prove that, I don't know. But they were not thinking about the nutrient value or killing of bacteria. They probably had a concept of being sickened by food and learned that certain foods will not make you sick if you do this to them first, but initially I think it had to do with taste.