The first point worth noting about this, is that Aristotle did not simply assume slavery was natural, because it was practiced virtually everywhere in the ancient world.

第一点值得注意的是，亚里士多德并未,简单纯地假设奴役是自然的，只因奴役在古代的世界,四处可见。

耶鲁公开课 - 政治哲学导论课程节选