ILLUSTRATIONS
| Socrates | Frontispiece | |
| Plato | 7 | |
| Aristotle | 62 | |
| Francis Bacon | 118 | |
| Spinoza | 164 | |
| Voltaire | 218 | |
| John Locke | 279 | |
| Jean Jacques Rousseau | 283 | |
| Immanuel Kant | 285 | |
| G. W. F. Hegel | 318 | |
| Arthur Schopenhauer | 329 | |
| Auguste Comte | 381 | |
| Herbert Spencer | 395 | |
| Friedrich Nietzsche | 438 | |
| Henri Bergson | 488 | |
| Benedetto Croce | 507 | |
| Bertrand Russell | 518 | |
| George Santayana | 532 | |
| William James | 554 | |
| John Dewey | 566 | |
| Table of Philosophic Affiliations | 110 and 111 | |
