Included are these great thinkers: Plato and Socrates, Aristotle, Epicurus, Marcus Aurelius, Thomas Aquinas, Francis Bacon, Descartes, Spinoza, Locke, Hume, Voltaire, Kant, Hegel, Schopenhauer, Emerson, Spencer, Nietzsche, William James, Henri-Louis Bergson, and Santayana.
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