- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- An Essay on the Principle of Population
- A Philosophical Dictionary, Volume 1
- Petty Troubles of Married Life, Second Part
- On Compromise
- Beantwortung der Frage: Was ist Aufklärung?
- Ethics — Part 1
- Politics: A Treatise on Government
- Studies in Pessimism
- The Philosophy of Evolution
- Essays
- The Critique of Practical Reason
- Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1753-54
- The Spirit Proper to the Times.
- The Consolation of Philosophy
- The Golden Sayings of Epictetus
- Dialogues Concerning Natural Religion
- The Philosophy of Spinoza
- Philosophical Letters of Frederich Schiller
- Aeroplanes
- Rollo's Philosophy. [Air]
- A Treatise Concerning the Principles of Human Knowledge
- Insights and Heresies Pertaining to the Evolution of the Soul
- Ethics — Part 3
- A Guide to Methods and Observation in History
- The Faith of Our Fathers
- Notes from the Underground
- Esprit des lois
- The Preface to Aristotle's Art of Poetry
- The Etiquette of To-day
- Study of Child Life
- An Enquiry Concerning Human Understanding
- The System of Nature, Volume 1
- How to Tell Stories to Children, And Some Stories to Tell
- How to Tell Stories to Children, And Some Stories to Tell
- How to Observe
- Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1751
- Catherine De Medici
- The Republic
- Old-Fashioned Ethics and Common-Sense Metaphysics
- The Essays of Arthur Schopenhauer; Religion, a Dialogue, Etc.
- The System of Nature, Volume 2
- Pedagogics as a System
- L'homme Qui Rit
- The Physical Life of Woman:
- Littérature et Philosophie mêlées
- Utilitarianism
- Dissertation on Slavery
- A Essay Towards a New Theory of Vision
- Reflections; or Sentences and Moral Maxims
- Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences
- The Holy war, made by King Shaddai upon Diabolus, for the regaining of the metropolis of the world; ...
- The Ego and His Own
- Essays of Schopenhauer
- A Review of Edwards's
- Ethica. English
- The Physiology of Marriage, Part 2
- Where We Live
- No Compromise with Slavery
- Ethics — Part 4
- The Selections from the Principles of Philosophy
- An American Girl Abroad
- Guide to Stoicism
- Study of a Woman
- Chinese Literature
- Is Life Worth Living?
- Quotes and Images From The Confessions of J. J. Rousseau
- The Countess of Saint Geran
- The Young Woman's Guide
- A Philosophical Dictionary, Volume 10
- Filosofía Fundamental
- Essays
- Auguste Comte and Positivism
- The Philosophy of the Moral Feelings
- Civil Disobedience
- Ethics — Part 2
- Creating Capital
- An Enquiry Concerning the Principles of Taste, and of the Origin of our Ideas of Beauty, etc.
- A Philosophical Dictionary, Volume 4
- The Child at Home
- The Prince
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- A General Plan for a Mail Communication by Steam, Between Great Britain and the Eastern and Western ...
- What is Property?
- Ethics — Part 5
- Fundamental Principles of the Metaphysic of Morals
- A Treatise of Human Nature
- An Appeal in Favor of that Class of Americans Called Africans
- A Very Pleasaunt & Fruitful Diologe Called The Epicure
- Beyond Good and Evil
- A System of Logic: Ratiocinative and Inductive
- The Existence of God
- Disputed Handwriting
- Improvement of the Understanding
- A Saudade
- Walden
- An Essay on Slavery and Abolitionism
- The Metaphysical Elements of Ethics
- The Philosophy of the Conditioned
- Some Private Views