translation.en: So the question that motivates my research is the following: If you look at humanity's large-scale achievements, these really big things that humanity has gotten together and done historically -- like for example, building the pyramids of Egypt or the Panama Canal or putting a man on the Moon -- there is a curious fact about them, and it is that they were all done with about the same number off people.
translation.zh: 那激励我研究进程的问题如下： 试想人类的大型成就 人类共同 创造的那些大型历史性事物－ 比如 建造埃及金字塔 开凿巴拿马运河 或者把人类送上月球－ 这些工程都有个奇怪的事实 就是它们基本都是由一样数量的人们完成的