Alfred North Whitehead (1)

Aristotle (3)

Bertrand Russell (1)

David Hume (2)

Edmund Burke (1)

Friedrich Wilhelm Nietzsche (1)

G. E. Moore (1)

George Berkeley (1)

Gottfried Wilhelm Leibniz (1)

Immanuel Kant (1)

John Stuart Mill (3)

Marcus Aurelius (1)

Michael Faraday (1)

Nicolo Machiavelli (1)

Plato (2)

Robert D. Hicks (1)

Sidney Hook (1)

Theodore Buckley (1)

Thomas Hobbes (1)

William Ellis (1)

William James (1)

Great Minds Series (1)