David Hume
Nicholas Capaldi
Georg Wilhelm Friedrich Hegel
John E. Smith
Friedrich Nietzsche
Richard Schacht
Immanuel Kant
A. J. Mandt
Jean-Paul Sartre
John Compton
John Dewey
John J. Stuhr
Plato
Berel Lang
St. Thomas Aquinas
Kenneth L. Schmitz
St. Augustine
R. J. O'Connell
Søren Kierkegaard
George Connell
Baruch Spinoza
Thomas Cook
Arthur Schopenhauer
Mark Stone