In Physics 2.8 Aristotle argues for his natural teleology by arguing for the goal-directed character of nature. The argument that he develops with the most care is directed against those natural philosophers, like Empedocles, who maintain that the results of natural processes which benefit organisms, such as teeth, come to be through chance. Aristotle counters by arguing that because the beneficial results of natural processes occur regularly, ‘always or for the most part’, they cannot be the outcome of chance, which (...) would yield beneficial results only irregularly. Thus such results must come to be only for the sake of some end. This argument against chance has received the most attention from scholars, but Physics 2.8 contains another argument for the goal-directed character of nature, which has received relatively little attention because it does not seem to offer much argument for natural teleology. The argument depends upon an analogy between action and nature, and it simply maintains that since human action and nature are analogous, and since action is goal-directed, so too is nature. The argument is of interest, despite its neglect, because it seems to prove nothing to us and yet Aristotle puts it forward confidently as advancing his view about the goal-directed character of nature. The argument from analogy should claim our attention because it provides important evidence for the basic spring behind Aristotle 's natural teleology. The fact that Aristotle takes for granted the strength of the analogy with human action in his argument for the goal-directedness of nature suggests that he holds human-like goal-directedness to be a condition of intelligibility that must be met by any intelligible process of coming to be, whether human or natural. (shrink)