translation.en: But, if you pit 1,000 humans against 1,000 chimpanzees, the humans will win easily, for the simple reason that a thousand chimpanzees cannot cooperate at all.
translation.zh: 但，如果数目提高到 一千个人和一千头黑猩猩， 人类就能轻易获胜。 因为上千头黑猩猩无法一起合作。