“There’s paleo, and then there’s the raw diet. Folks who eat raw tout the health benefits of the approach, saying that they’re accessing the full, complete nutrients available because they’re not heating, and thus destroying, their dinner. But that’s simply wrong. We cook to get our hands on more nutrients, not fewer. According to Wrangham, the one thing absolutely all cultures have in common is that they cook their food. He points out that women who move towards 100 percent raw diets often stop ovulating, because even if in theory they’re tossing sufficient food into the blender to fulfill their caloric needs, they simply can’t absorb enough from the uncooked food.
Our hefty cousins, the apes, spend half their waking hours gnawing on raw sustenance, about six hours per day. In contrast, we spend only one hour. “So in a sense, cooking opens up this space for other activities,” says Pollan. “It’s very hard to have culture, it’s very hard to have science, it’s very hard to have all the things we count as important parts of civilization if you’re spending half of all your waking hours chewing.” Cooked food: It gave us civilization.” Source.