Philosophy: The Foundation of All Inquiry
From Plato's dialogues in ancient Athens to the existentialists of 20th-century Paris, philosophy has shaped every dimension of human thought. These 100 works represent the most enduring investigations into truth, justice, consciousness, and the meaning of existence.
The Definitive Philosophy List
Each book is scored across academic citations, philosophical influence, translation reach, curricular inclusion, and cross-generational staying power.
| # | Title | Author | Year | Country | Score |
|---|---|---|---|---|---|
| 1 | The Republic | Plato | ~380 BC | Greece | 99 |
| 2 | Nicomachean Ethics | Aristotle | ~340 BC | Greece | 98 |
| 3 | Meditations | Marcus Aurelius | 180 AD | Rome | 97 |
| 4 | Critique of Pure Reason | Immanuel Kant | 1781 | Germany | 97 |
| 5 | Being and Time | Martin Heidegger | 1927 | Germany | 96 |
| 6 | Thus Spoke Zarathustra | Friedrich Nietzsche | 1885 | Germany | 96 |
| 7 | Phenomenology of Spirit | Georg Wilhelm Friedrich Hegel | 1807 | Germany | 96 |
| 8 | Confessions | Augustine of Hippo | ~400 AD | Roman Africa | 95 |
| 9 | Meditations on First Philosophy | Rene Descartes | 1641 | France | 95 |
| 10 | Beyond Good and Evil | Friedrich Nietzsche | 1886 | Germany | 95 |
| 11 | An Essay Concerning Human Understanding | John Locke | 1689 | England | 95 |
| 12 | Summa Theologica | Thomas Aquinas | 1274 | Italy | 94 |
| 13 | Being and Nothingness | Jean-Paul Sartre | 1943 | France | 94 |
| 14 | Ethics | Baruch Spinoza | 1677 | Netherlands | 94 |
| 15 | Leviathan | Thomas Hobbes | 1651 | England | 94 |
| 16 | A Treatise of Human Nature | David Hume | 1739 | Scotland | 93 |
| 17 | Philosophical Investigations | Ludwig Wittgenstein | 1953 | Austria/UK | 93 |
| 18 | Tractatus Logico-Philosophicus | Ludwig Wittgenstein | 1921 | Austria | 93 |
| 19 | The Social Contract | Jean-Jacques Rousseau | 1762 | Switzerland/France | 93 |
| 20 | Two Treatises of Government | John Locke | 1689 | England | 92 |
| 21 | The Tao Te Ching | Laozi | ~400 BC | China | 92 |
| 22 | The Analects | Confucius | ~500 BC | China | 92 |
| 23 | Critique of Practical Reason | Immanuel Kant | 1788 | Germany | 92 |
| 24 | The Prince | Niccolo Machiavelli | 1532 | Italy | 91 |
| 25 | Metaphysics | Aristotle | ~350 BC | Greece | 91 |
| 26 | On Liberty | John Stuart Mill | 1859 | England | 91 |
| 27 | The Second Sex | Simone de Beauvoir | 1949 | France | 91 |
| 28 | A Theory of Justice | John Rawls | 1971 | USA | 90 |
| 29 | The Myth of Sisyphus | Albert Camus | 1942 | France | 90 |
| 30 | Either/Or | Soren Kierkegaard | 1843 | Denmark | 90 |
| 31 | The Consolation of Philosophy | Boethius | 524 | Rome | 90 |
| 32 | Discourse on the Method | Rene Descartes | 1637 | France | 90 |
| 33 | Fear and Trembling | Soren Kierkegaard | 1843 | Denmark | 89 |
| 34 | The World as Will and Representation | Arthur Schopenhauer | 1818 | Germany | 89 |
| 35 | Groundwork of the Metaphysics of Morals | Immanuel Kant | 1785 | Germany | 89 |
| 36 | Utilitarianism | John Stuart Mill | 1863 | England | 89 |
| 37 | On the Genealogy of Morality | Friedrich Nietzsche | 1887 | Germany | 88 |
| 38 | The Symposium | Plato | ~385 BC | Greece | 88 |
| 39 | Monadology | Gottfried Wilhelm Leibniz | 1714 | Germany | 88 |
| 40 | Process and Reality | Alfred North Whitehead | 1929 | England/USA | 88 |
| 41 | The Sickness Unto Death | Soren Kierkegaard | 1849 | Denmark | 87 |
| 42 | Phaedo | Plato | ~360 BC | Greece | 87 |
| 43 | An Enquiry Concerning Human Understanding | David Hume | 1748 | Scotland | 87 |
| 44 | The Phenomenology of Perception | Maurice Merleau-Ponty | 1945 | France | 87 |
| 45 | Discipline and Punish | Michel Foucault | 1975 | France | 87 |
| 46 | The Structure of Scientific Revolutions | Thomas Kuhn | 1962 | USA | 86 |
| 47 | Totality and Infinity | Emmanuel Levinas | 1961 | France | 86 |
| 48 | Critique of Judgment | Immanuel Kant | 1790 | Germany | 86 |
| 49 | The Spirit of the Laws | Montesquieu | 1748 | France | 86 |
| 50 | Truth and Method | Hans-Georg Gadamer | 1960 | Germany | 86 |
About Our Philosophy Rankings
A philosophy book must demonstrate exceptional performance across multiple scoring criteria including sustained academic citation impact, inclusion in university philosophy curricula worldwide, significant translation reach, documented influence on subsequent philosophical movements, and proven cross-generational relevance spanning centuries of ongoing scholarly engagement.
Plato's Republic achieves the highest weighted consensus score due to its unmatched foundational influence on Western philosophy, political theory, ethics, and epistemology. It remains universally required in philosophy curricula, has been translated into virtually every written language, and continues to generate active scholarly debate nearly 2,400 years after its composition. No other philosophical work has shaped as many distinct fields of human inquiry.
Rankings are reviewed quarterly as new data becomes available from academic publications, citation indices, curricular surveys, and translation records. While the core canon of philosophy remains remarkably stable, scores are refined as new scholarship and cultural impact metrics emerge.