Alan Ryan

Michel de Montaigne

Elaine Sternberg

David Conway

Ralph McInerny

William Godwin

Nicholas Capaldi

Francis Hutcheson

Ayn Rand

Mo Tzu

Peter Vallentyne

Jennifer A. Frey

Jack Russell Weinstein

Evelyn Shirley Shuckburgh

Socrates

Jean-Jacques Rousseau

Eric Schliesser

Rhazes

Eric Mack

Stuart D. Warner

Daniel L. Dreisbach

Plato

Paul Carus

Dugald Stewart

Anthony Ashley Cooper, Earl of Shaftesbury

Lewis Amherst Selby-Bigge

Henry B. Veatch

Aeon J. Skoble

Matt Zwolinski

Brian Kogelmann

Thomas Reid

William George Pogson Smith

Alexander the Great