There are some who believe that slavery is natural, because ruling and being ruled is a pervasive distinction " that one sees all societies practice."

有些人相信,奴役是自然的演变，因为统治者与被统治者,有着普遍的区别,一方要看顾着整个社会的运作“

耶鲁公开课 - 政治哲学导论课程节选