First published in 1982, this is an introduction to St Thomas's moral philosophy. In this revised edition, the basics of Thomistic ethics and teachings are revisited. First published fifteen years ago, Ethica Thomistica is widely recognized as one of the finest introductions to St. Thomas's moral philosophy. Though the book has been out of print for several years, scholars and students still refer to it as the standard resource on Thomistic ethics. In this much-anticipated, revised edition, Ralph McInerny revisits the basics of Thomas's teachings and offers a brief, intelligible, and persuasive summary.