The Appeal to Nature in Cicero's De finibus

When Cicero examines the varied versions of cradle arguments that appear in De finibus, he finds much to criticize. Though he rejects these attempts to discern our proper ethical ends from the earliest inclinations of newborn animals, he nevertheless accepts that human beings should adopt ends for themselves that are consistent with, and perfections of, human nature. I argue that Cicero uses two connected argumentative strategies to create an appeal to nature that overcomes some basic problems he has with the cradle arguments used in Epicureanism, Stoicism, and the Old Academy. The first strategy criticizes the different cradle arguments directly, by which Cicero establishes two negative criteria for any appeal to nature. These criteria indicate what to avoid in arguing for a highest moral end or summum bonum. These criteria eliminate the Epicurean and Stoic cradle arguments, and more subtly criticizes the Antiochian one. As a result, it may seem plausible that Cicero either adopts the Antiochian position himself or that he at least considers it to be a strong position that is worthy of further consideration, particularly in contrast with his categorical rejection of the other schools. Cicero’s second strategy, however, leads us away from accepting any established cradle argument, including the Antiochian one. This strategy develops a rich theme of education over the course of the text and emphasizes an appeal to the telic sense of “nature” that ultimately meets the two criteria set out by his first strategy. He does not seek ethical direction in some biological origin and given nature as cradle arguments do. Cicero appeals instead to human nature and its summum bonum as it appears during philosophical education. Though he finds cradle arguments rely too much on given nature and too little on telic nature, Cicero’s own own emphasis on education and telic nature amounts to a new appeal to “nature” that, in avoiding the “cradle”, is more sound than those of his philosophical rivals.