Alan Ryan

Immanuel Kant

Elaine Sternberg

Epictetus

James Mill

Mortimer J. Adler

Benjamin Hoffmann

Lao Tzu

Carlo Lottieri

Jeremy Shearmur

Rhazes

Maia Cummings

William George Pogson Smith

Michael Huemer

Peter Paul Seaton Jr.

Avicenna

Eric Mack

Jean-Jacques Rousseau

Aeon J. Skoble

Sir James Mackintosh

Ralph McInerny

J.W. Semple

Jeremy Bentham

Alexander the Great

Benedict de Spinoza

Jack Russell Weinstein

David W. Carrithers

John Passmore

Boethius

Francis Hutcheson

Aaron Garrett

Jennifer A. Frey

John Locke