Abstract
ARISTOTLE IS UNIVERSALLY credited with inventing the concept of teleology: "nature is among the causes which act for the sake of something." "That for the sake of which" is a thing's purpose, its end, the goal at which it aims. Taking Aristotle's physics as a focal point for his philosophy of nature, I shall argue that teleology functions within his theory of nature not only substantively, but also procedurally. First, then, I shall explain what I mean by teleology as procedure and then show how this procedure relates both to problems within physics and to Aristotle's conception of physics as a science.