translation.en: Someone could give a talk and say, look at us, we've got these really sharp teeth and muscles and a brain that's really good at throwing weapons, and if you look at lots of societies around the world, you'll see very high rates of violence.
translation.zh: 有人会发表一个演讲并说， 看看我们，我们已经有了很尖的牙齿 很好的肌肉和大脑 很擅长于抛掷武器， 如果你看看世界各地的社会群体 你会发现暴力时常发生。