Ludwig Wittgenstein, Edmund Husserl, Karl Marx, Søren Kierkegaard, Friedrich Nietzsche, Ralph Waldo Emerson, John Stuart Mill, Georg Wilhelm Friedrich Hegel, Friedrich Schelling, Johann Gottlieb Fichte, Immanuel Kant, John Locke, Montesquieu, Jean-Jacques Rousseau, David Hume, Gottfried Wilhelm Leibniz, Baruch Spinoza, Konfuzius, LaoTse, Plato, Xenophon, Aristotle, Cicero, Sêneca, Epiktet, Marc Aurel, Plotin, Thomas von Aquin, Nicolaus von Cues, Erasmus von Rotterdam, Niccolò Machiavelli, Tommaso Campanella, Martin Luther, Giordano Bruno, Samuel von Pufendorf, Abbé Castel de Saint-Pierre, Michel de Montaigne, René Descartes, Francis Bacon & Blaise Pascal
Boethius, William James, Thomas Paine, Paul Henri Thiery Holbach, Austin Holyoak, Baruch Spinoza, Hastings Rashdall, Edward Caldwell Moore, Frances Power Cobbe, Herbert Spencer, H.R. James, M. De Mirabaud & R.H.M. Elwes
