Aristotle's Nicomachean Ethics is the text which had the single greatest influence on Aquinas's ethical writings, and the historical and philosophical value of Aquinas's appropriation of this text provokes lively debate. In this volume of new essays, thirteen distinguished scholars explore how Aquinas receives, expands on, and transforms Aristotle's insights about the attainability of happiness, the scope of moral virtue, the foundation of morality, and the nature of pleasure. They examine Aquinas's commentary on the Ethics and his theological writings, above all the Summa theologiae. Their...