- Aristotle - Greek philosopher, tutor of young Alexander the Great
- Bentham, Jeremy - 18th/19th century English philosopher and legal scholar, an early proponent of utilitarianism
- Condillac, Etienne Bonnot de - 18th century French philosopher
- Ferguson, Adam - 18th century Scottish philosopher and historian
- Flew, Antony - British philosopher, emeritus professor of philosophy, University of Reading
- Herbert, Auberon - Nineteenth century English philosopher and Member of Parliament
- Hospers, John - Professor of philosophy, 1972 Libertarian Presidential candidate
- Hume, David - 18th century Scottish philosopher
- Hutcheson, Francis - 18th century Irish philosopher
- Jouvenel, Bertrand de - 20th century French philosopher
- Kelley, David - Founder and Executive Director of The Objectivist Center
- Lao Tzu - Ancient Chinese philosopher, author of the Tao Te Ching
- Locke, John - 17th century English philosopher
- Machan, Tibor R. - Professor of philosophy and business ethics, co-founder of Reason magazine
- Mandeville, Bernard de - 18th century Dutch philosopher, physician and satirist
- Mill, John Stuart - Nineteenth century British philosopher and economist
- Narveson, Jan - Professor of philosophy at the University of Waterloo, Canada, and author of The Libertarian Idea
- Nozick, Robert - Professor of philosophy, author of Anarchy, State, and Utopia
- Popper, Karl - 20th century Austrian-born British philosopher
- Rand, Ayn - Objectivist philosopher, novelist
- Rosenbaum, Alissa Zinovievna@ - Birth name of philosopher Ayn Rand
- Schutz, Alfred - 20th century Austrian philosopher and sociologist
- Spencer, Herbert - 19th century English philosopher
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