translation.en: If you wonder, why it is the Tarahumara don't fight and don't die of heart disease, why a poor Ethiopian woman named Derartu Tulu can be the most compassionate and yet the most competitive, and why we somehow were able to find food without weapons, perhaps it's because humans, as much as we like to think of ourselves as masters of the universe, actually evolved as nothing more than a pack of hunting dogs.
translation.zh: 如果你想知道为什么塔拉乌马拉人没有战斗 不会死于心脏病， 为什么可怜的埃塞俄比亚女子德拉图·图鲁 会是最有同情心，同时又最具有竞争力， 为什么我们反而能够 不用武器也能觅食， 也许仅仅是因为人类， 和我们乐于认为我们自己是宇宙的主人一样， 实际上人类进化的更像是一群猎犬， 而不是像其他的什么。