He speculates that Homo sapiens is a more efficient herbivore than carnivore, but crushing and cooking makes meat more digestible and also makes it easy to consume amounts in excess of needs.

• 他猜想现代人作为食草动物比食肉动物更为有效，但粉碎与烹煮使肉类易于消化而且也使过度食肉变得容易。