Alan Ryan

Francis Hutcheson

David Conway

Matt Zwolinski

Samuel Gregg

Mary Campbell Smith

Benedict de Spinoza

Rachel Ferguson

Confucius

Paul Carus

Peter C. Myers

James Beattie

Joseph Rickaby, S.J.

Khalil M. Habib

Tibor R. Machan

Gershom Carmichael

John Locke

Lewis Amherst Selby-Bigge

Lao Tzu

Avicenna

Sir Edwin Chadwick

Brian Kogelmann

Sir James Mackintosh

Charlotte C. Thomas

Helmut Schoeck

Plutarch

Alexander Broadie

Benjamin Hoffmann

Nicholas Capaldi

Epictetus

John Stuart Mill

Michael Huemer

René Descartes