In his Treatise on the Virtues, Aquinas discusses the character and function of habit; the essence, subject, cause, and meaning of virtue; and the separate intellectual, moral, cardinal, and theological virtues. His work constitutes one of the most thorough and incisive accounts of virtue in the history of Christian philosophy. John Oesterle's accurate and elegant translation makes this enduring work readily accessible to the modern reader.

Many great thinkers have wrestled with the topic of evil. St. Thomas Aquinas's disputed question On Evil merges as the longest and most comprehensive study on the subject of evil available. This long-awaited translation is based on the critical edition of the Latin text published by the Leonine Commission in 1982. The disputed question De malo (On Evil) was first presented as a series of oral debates at the University of Paris (1263-1272?) and subsequently recorded in the form in which it now appears. The length of the work and the thoroughness of the treatment is eloquent testimony of the importance St. Thomas attached to this topic.

In his Treatise on the Virtues, Aquinas discusses the character and function of habit; the essence, subject, cause, and meaning of virtue; and the separate intellectual, moral, cardinal, and theological virtues. His work constitutes one of the most thorough and incisive accounts of virtue in the history of Christian philosophy. John Oesterle's accurate and elegant translation makes this enduring work readily accessible to the modern reader.

The Treatise on Happiness and the accompanying Treatise on Human Acts comprise the first twenty-one questions of I-II of the Summa Theologiae. From his careful consideration of what true happiness is, to his comprehensive discussion of how it can be attained, St. Thomas Aquinas offers a challenging and classic statement of the goals of human life, both ultimate and proximate. This translation presents in accurate, consistent, contemporary English the great Christian thinker's enduring contributions on the subject of man's happiness.