Aristotle's moral philosophy is a pillar of Western ethical thought. It bequeathed to the world an emphasis on virtues and vices, happiness as well-being or a life well lived, and rationally motivated action as a mean between extremes. Its influence was felt well beyond antiquity into the Middle Ages, particularly through the writings of St. Thomas Aquinas. In the past century, with the rise of virtue theory in moral philosophy, Aristotle's ethics has been revived as a source of insight and interest. While most attention has traditionally focused on Aristotle's famous Nicomachean Ethics, there are several other works written by or attributed to Aristotle that illuminate his ethics: the Eudemian Ethics, the Magna Moralia, and Virtues and Vices.
