| | Greek and Greco-Roman Philosophy |
| | Greco-Oriental Philosophy |
| | Chapter XIX : Greco-Jewish Philosophy |
| | Chapter XX : Neo-Pythagoreanism and Neo-Platonism |
| | Philosophy of the Christian Era |
| | Chapter XXI : Heretical Systems |
| | Chapter XXII : Ante-Nicene Fathers |
| | Chapter XXIII : Post-Nicene Fathers |
| | First Period: Transition from Scholastic to Modern Philosophy |
| | Second Period: From Descartes to Kant |
| | Third Period: From Kant to Our Own Time |
| | by William Turner, S.T.D. |
| | Greek and Greco-Roman Philosophy |
| | First Period: Pre-Socratic Philosophy |
| | Chapter I : Earlier Ionian School |
| | Chapter II : The Pythagorean School |
| | Chapter III : The Eleatic School |
| | Chapter IV : Later Ionian Philosophers |
| | Chapter VI : The Sophists |
| | Third Period: Post-Aristotelian Philosophy |
| | Chapter XIII : The Stoics |
| | Chapter XIV : The Epicureans |
| | Chapter XV : The Sceptics |
| | Chapter XVI : The Eclectics |
| | Chapter XVII : The Scientific Movement |
| | Chapter XVIII : Philosophy of the Romans |
| | Second Period: Socrates and the Socratic Schools |
| | Chapter VIII : The Imperfectly Socratic Schools |
| | Chapter X : The Platonic Schools |
| | Chapter XII : The Peripatetic School |
| | by William Turner, S.T.D. |
| | First Period of Scholasticism |
| | Chapter XXIV : First Masters of the Schools |
| | Chapter XXV : John Scotus Erigena |
| | Chapter XXVII : The School of Auxerre |
| | Second Period of Scholasticism |
| | Roscelin to Alexander of Hales (1050-1200) |
| | Chapter XXVIII : Predecessors of Roscelin |
| | Chapter XXXI : William of Champeaux, the Indifferentists, etc. |
| | Chapter XXXIII : The School of Chartres |
| | Chapter XXXIV : Eclectics |
| | Chapter XXXV : THe Mystic School |
| | Chapter XXXVI : The Pantheistic School |
| | Third Period of Scholasticism |
| | Alexander of Hales to Ockam (1200-1300) |
| | Chapter XXXVII : Predecessors of St. Thomas |
| | Chapter XXXVIII : St. Thomas of Aquin |
| | Chapter XXXIX : Thomists and Anti-Thomists |
| | Chapter XL : Henry of Ghent |
| | Chapter XLI : John Duns Scotus |
| | Chapter XLII : Averroism in the Schools |
| | Fourth Period of Scholasticism |
| | Birth of Ockam to taking of Constantinople (1300-1453) |
| | Chapter XLIII : Predecessors of Ockham: Durandus, Aureolus |
| | Chapter XLIV : William of Ockam |
| | Chapter XLV : Followers and Opponents of Ockam |
| | Chapter XLVI : The Mystic School |
| | Chapter XLVII : Nicholas of Autrecourt |
| | by William Turner, S.T.D. |
| | Third Period: From Kant to Our Own Time |
| | Chapter LXIII : German Philosophy: Kant |
| | Chapter LXIV : German Philosophy: The Kantians, The Romantic Movement, |
| | Chapter LXV : German Philosophy: Hegel, the Hegelians |
| | Chapter LXVI : German Philosophy: The Reaction against Hegel; Herbart, |
| | Chapter LXVII : The Scottish School |
| | Chapter LXVIII : French Philosophy |
| | Chapter LXIX : English Philosophy |
| | Chapter LXX : Italian Philosophy |
| | Chapter LXXI : American Philosophy |
| | Chapter LXXII : Catholic Philosophy in the Nineteenth Century |
| | Chapter LXXIII : Contemporary Philosophy |
| | Chapter LXXIV : Conclusion |
| | by William Turner, S.T.D. |
| | Second Period: From Descartes to Kant |
| | Chapter LV : Cartesianism |
| | Chapter LVII : English Empiricism |
| | Chapter LVIII : British Moralists |
| | Chapter LIX : French Empiricism |
| | Chapter LX : The Idealistic Movement |
| | Chapter LXI : Pan-phenomenalism -- Hume |
| | Chapter LXII : German Illumination -- Transition to Kant |
| | by William Turner, S.T.D. |
| | First Period: Transition from Scholastic to Modern Philosophy |
| | Chapter XLVIII : Scholastics of the Transition Period |
| | Chapter XLIX : The Humanists |
| | Chapter L : Italian Philosophy of Nature |
| | Chapter LI : The Scientific Movement |
| | Chapter LII : Protestant Mysticism |
| | Chapter LIII : Systems of Political Philosophy |
| | by William Turner, S.T.D. |
| |