Summa Contra Gentiles, written in the 1260s, is considered one of Aquinas's most important works. A systematic treatise, and to some extent an apologia for the Catholic faith, it is a central text for understanding Aquinas's account of God, creation, providence, human nature, grace, and divine revelation. The essays in this Critical Guide, written by an international group of leading scholars, examine the work's historical setting, argumentative structure, principal doctrines, later reception, and relevance for contemporary philosophical and theological debates. The volume brings together focused studies of the Summa Contra Gentiles's most important themes, including divine goodness, analogy, human nature, providence, substance, essence and existence (esse), causality, evil, grace, the Trinity, and the Incarnation. It will be of particular value to scholars and students of medieval philosophy, medieval theology, philosophy of religion, metaphysics, and the history of Christian thought.