Teleology is the study of the ends or purposes that things serve, and Aristotle’s emphasis on teleology has repercussions throughout his philosophy. Aristotle believed that the best way to understand why things are the way they are is to understand what purpose they were designed to serve. For example, we can dissect an animal to see how its anatomical organs look and what they’re made of, but we only understand each organ when we perceive what it’s supposed to do. Aristotle’s emphasis on teleology implies that there is a reason for everything. Just as Aristotle sees purpose in anatomical and biological systems, he sees human life as organized and directed toward a final end as well. Because we are essentially rational, Aristotle argues that rationality is our final cause and that our highest aim is to fulfill our rationality. This argument has a deep impact both on Aristotle’s ethics and on his politics. The good life, for which all our virtue and wisdom prepares us, consists primarily of rational contemplation, and the purpose of the city-state is to arrange matters in such a way as to maximize the opportunities for its citizens to pursue this good life.