This volume considers the Aristotelian virtue-ethics tradition as it develops in the writings of Thomas Aquinas. Part One studies the types of virtues Aquinas believes are held by Christians in a state of grace. Aquinas's intriguing account is apparently fraught with inconsistencies, which have split contemporary interpreters over not only how to understand Aquinas on this matter, but also as to whether it is even possible to provide a consistent interpretation of his doctrine. This book brings together scholarship that reflects the various sides of the debate. Part Two explores a Thomistic synthesis regarding Aquinas's account of the good as telos or end that emerges in the seventeenth century, as well as what promise his virtue ethics holds today, arguing that Aquinas' hylomorphic understanding of human beings as matter-form composites furnishes a robust moral accounting that seems unavailable to alternative, reductive materialist accounts.