The second edition of Aquinas, On Law, Morality, and Politics retains the selection of texts presented in the first edition but offers them in new translations by Richard J. Regan—including that of his Aquinas, Treatise on Law (Hackett, 2000). A revised Introduction and glossary, an updated select bibliography, and the inclusion of summarizing headnotes for each of the units—Conscience, Law, Justice, Property, War and Killing, Obedience and Rebellion, and Practical Wisdom and Statecraft—further enhance its usefulness.