BOOK ONE: ANCIENT PHILOSOPHY, Part 1. The Pre-Socratics, Part 2. Socrates, Plato, and Aristotle, Part 3. Ancient Philosophy after Aristotle, BOOK TWO: CATHOLIC PHILOSOPHY, Introduction, Part 1. The Fathers, Part 2. The Schoolmen, BOOK THREE: MODERN PHILOSOPHY, Part 1. From the Renaissance to Hume, Part 2. From Rousseau to the Present Day.