Alan Ryan

David W. Carrithers

Gershom Carmichael

Khalil M. Habib

Elaine Sternberg

Thomas Reid

James Mill

Francisco Suárez

Ralph McInerny

Thomas Hobbes

Bas van der Vossen

Rachel Ferguson

Andrea Branchi

Francis Hutcheson

Sir Edwin Chadwick

Aeon J. Skoble

Lewis Amherst Selby-Bigge

Jan Narveson

Mary Campbell Smith

Socrates

Jean-Jacques Rousseau

Jeremy Bentham

Dugald Stewart

Boethius

Paul Carus

Evelyn Shirley Shuckburgh

Lao Tzu

Jeremy Shearmur

Thales

Mortimer J. Adler

Michael Polanyi

Samuel Fleischacker

Nicholas Capaldi