Aristotle's claim about naturalness seems to require, as he told us, slavery, the categorical distinction of humanity into masters and slaves.

亚里士多德关于自然演变的主张,似乎包含了奴役，分类地,将人类区别成主与奴。

耶鲁公开课 - 政治哲学导论课程节选

"For we assert," he says, "nature does nothing in vain and man alone " among the animals has speech.

他说，“因为我们主张自然演变并不无道理,而人类独立于其它动物之外,是因为我们有辩论能力。

耶鲁公开课 - 政治哲学导论课程节选