Thomas Aquinas (1225-74) was an Italian philosopher and Dominican friar. Ralph McInerny is Professor of Medieval Studies at the University of Notre Dame. Pre-eminent as a Thomas scholar, his many books include Aquinas Against the Averroists & A First Glance at St Thomas Aquinas.

"There are readers of Aquinas's works, but Penguin's surpasses all by its sheer size, the very representative choice of texts, the excellent translations, and scholarly, informative introductions." —Albert E. Gunn

• Selected Writings - Thomas Aquinas IntroductionChronologyA Note on the TextsPart One: Student (1245-56)1. The Inaugural Sermons (1256)2. On the Principles of Nature (1252-6)3. On Being and Essence (1252-6)4. The Nature of Theology. Commentary on Sentences I, Prologue (1252-4)5. The Work of the Six Days of Creation. Commentary on Sentences 2.2, d. 12 (1252-4)Part Two: Master at Paris (1256-9)6. Theology, Faith and Reason. On Boethius On the Trinity, 1-2 (1257)7. How are Things Good? Exposition of On the Hebdomads of Boethius (1257)8. The Meanings of Truth. Disputed Question on Truth, I (1256-9)9. On the Teacher. Disputed Question on Truth, II (1256-9)10. On Conscience. Disputed Question on Truth, 17 (1256-9)Part Three: Italy (1259-68)11. Proof of God's Existence. Summa contra Gentiles, I, 9-14 (1259)12. The Human Good. Summa contra Gentiles, 3 (1259-65)13. On the Divine Simplicity. Disputed Question of the Power of God, 7 (1265-6)14. On Goodness and the Goodness of God. Summa theologiae, 1, 5-6 (1268)15. On Creation. Summa theologiae, 1, 44 (1268)16. On Angelic Knowledge. Summa theologiae, 1, 54-8 (1268)17. Definitions of Soul. On Aristotle's De anima, 2, 1-3 (1268)18. Platonism and Neoplatonism. Preface to Exposition of On the Divine Names (1265-8)Part Four: Paris (1269-72)19. The Range of Natural Philosophy. Expositions of Physics, 1, 1, Preface to On the Heavens, Preface to On Sense and the Sensed Object (1269)20. How Words Mean. Exposition of On Interpretation, 1-5 (1270-71)21. On the Ultimate End. Summa theologiae, 1-2, 1-5 (1271)22. On Human Choice. Disputed Question on Evil, 6 (1266-72)23. What Makes Actions Good or Bad? Summa theologiae, 1-2, 18-20 (1271)24. On Law and Natural Law. Summa theologiae, 1-2, 90-94 (1271)25. The Virtues. Summa theologiae, 1-2, 55-7 (1271-2)26. The Active and Contemplative Lives. Summa theologiae, 2-2, 179-81 (1271-2)27. On the Eternity of the World (1271)28. The Love of Wisdom. Exposition of Metaphysics, Preface and 1, 1-3 (1271)Part Five: Naples (1272-4)29. The Logic of the Incarnation. Summa theologiae, 3, 16 (1273)30. What is a Sacrament? Summa theologiae, 3, 6 (1273)31. The Exposition of the Book of Causes, 1-5 (1272)32. Exposition of Paul's Epistle to Philemon (1273)33. Exposition of the Angelic Salutation (Ave Maria) (1273)Glossary