| Adamson, Robert@ (2) |
| Alcott, Amos Bronson@ (6) |
| Austin, John@ (1) |
| Bain, Alexander@ (3) |
| Bakunin, Mikhail@ (7) |
| Bastiat, Frederic@ (9) |
| Bauer, Bruno@ (4) |
| Bentham, Jeremy@ (20) |
| Bolzano, Bernard@ (8) |
| Boole, George@ (3) |
| Bosanquet, Bernard@ (1) |
| Bradley, Francis Herbert@ (3) |
| Brentano, Franz@ (6) |
| Caird, Edward@ (3) |
| Comte, Auguste@ (1) |
| Condorcet, Marquis de@ (5) |
| Constant, Benjamin@ (2) |
| Duhem, Pierre@ (6) |
| Engels, Friedrich@ (5) |
| Eucken, Rudolf@ (5) |
| Fedorov, Nikolai Fedorovich@ (3) |
| Ferrier, James Frederick@ (2) |
| Feuerbach, Ludwig@ (6) |
| Fichte, Johann Gottlieb@ (8) |
| Fourier, Charles@ (6) |
| Frege, Gottlob@ (11) |
| Fries, Jakob Friedrich@ (3) |
| Fuller, Sarah Margaret@ (10) |
| Godwin, William@ (15) |
| Green, Thomas Hill@ (5) |
| Hamilton, William@ (4) |
| Hartmann, Eduard von@ (2) |
| Hegel, Georg Wilhelm Friedrich@ (45) | |
| Herbart, Johann Friedrich@ (5) |
| Hermes, George@ (2) |
| Hodgson, Shadworth@ (2) |
| Huxley, Thomas Henry@ (8) |
| Jacobi, Friedrich Heinrich@ (5) |
| James, William@ (16) |
| Kierkegaard, Søren@ (20) |
| Lotze, Rudolf Hermann@ (5) |
| Marx, Karl@ (19) |
| McTaggart, John@ (6) |
| Meinong, Alexius@ (2) |
| Mill, Harriet Taylor@ (6) |
| Mill, John Stuart@ (26) |
| Nietzsche, Friedrich@ (40) |
| Peabody, Elizabeth Palmer@ (9) |
| Peirce, Charles Sanders@ (9) |
| Poincaré, Jules Henri@ (11) |
| Reinhold, Karl Leonhard@ (1) |
| Rosmini, Antonio@ (4) |
| Schelling, Friedrich Wilhelm Joseph@ (5) |
| Schleiermacher, Friedrich@ (7) |
| Schopenhauer, Arthur@ (9) |
| Sidgwick, Henry@ (10) |
| Solovyov, Vladimir@ (4) |
| Spencer, Herbert@ (11) |
| Stephen, Leslie@ (8) |
| Stirling, James Hutchison@ (3) |
| Stirner, Max@ (9) |
| Thoreau, Henry David@ (65) |
| Urráburu, Juan José@ (1) |
| Whewell, William@ (15) |
| Windischmann, Karl Joseph Hieronymus@ (2) |
| Wundt, Wilhelm@ (3) | |
