translation.en: 2,500 years ago, members of one Greek city-state considered members of another Greek city-state subhuman and treated them that way. And then this moral revolution arrived, and they decided that actually, no, Greeks are human beings.
translation.zh: 2500年钱，希腊城邦里的人， 认为其他希腊城邦里的人，都是次等人， 用对待此等人的方式对待他们。随着道德革命的开始， 他们改变了主意，所有的希腊人都是人类。