The Aquinas Ethicus: Volumes I & II is a masterful compilation of St. Thomas Aquinas’s ethical teachings, drawn primarily from his Summa Theologica. These volumes delve deep into Aquinas’s interpretation of virtue ethics, natural law, and moral theology, providing readers with a systematic analysis of human nature, good and evil, and the path to ethical living. Translators bring clarity to Aquinas’s complex Latin prose, making the intricate moral arguments accessible. This work is an invaluable resource for scholars, students, and anyone interested in medieval theology, philosophy, or Christian ethics.

Aquinas Ethicus: or, The moral teaching of St. Thomas. A translation of the principle portions of the second part of the “Summa Theologica”, with notes, Volume I – II. Download them both here:

Aquinas Ethicus Volume I

Aquinas Ethicus Volume II