» 19th Century European
- Active Powers
- Bentham, Jeremy
- Caird, Edward
- Donoso Cortés, Juan
- Ferrier, James Frederick
- Fichte, Immanuel Hermann
- German Idealism
- Goethe
- Hamilton, William
- Hartmann, Karl Robert Eduard Von
- Hegel: Social and Political Thought
- Hodgson, Shadworth
- Hölderlin, J. C. F.
- Huxley, Thomas Henry
- Kierkegaard, Søren
- Lotze, Rudolf Hermann
- Mill, John Stuart
- Nietzsche, Friedrich
- Schelling, F. W. J. von
- Schopenhauer, Arthur
- Solovyov, Vladimir
- Spencer, Herbert
- Stephen, Leslie
- Stirling, James Hutchison
