Books
Public-domain books from Project Gutenberg, with their chapters and the ideas they discuss.
- Adam Smith
- Albert Einstein
- Alfred John Church
- Alfred North Whitehead
- Antoine Fabre d'Olivet
- Aquinas Thomas
- Aristotle
- Arthur Schopenhauer
- Auguste Comte
- Averroës
- Avicenna
- Ayn Rand
- Benedictus de Spinoza
- Benjamin Franklin
- Bertrand Russell
- Boethius
- Canada
- Charles Darwin
- Charles S. Peirce
- Charles William Super
- Confucius
- Dante Alighieri
- David Hume
- E. Nesbit
- Edmund Burke
- Elizabeth Harrison
- Francis Bacon
- Friedrich Engels
- Friedrich Wilhelm Nietzsche
- G. E. Moore
- Galileo Galilei
- Georg Wilhelm Friedrich Hegel
- George Berkeley
- George Mezger
- Ghazzali
- Gottfried Wilhelm Leibniz
- Great Britain
- Guy Thorne
- H. L. Havell
- Henri Bergson
- Henri Poincaré
- Herbert Spencer
- Herodotus
- Hippocrates
- Homer
- Immanuel Kant
- Isaac Newton
- Japan
- Jean-Jacques Rousseau
- Jeremy Bentham
- Johann Wolfgang von Goethe
- John Dewey
- John Fletcher
- John Locke
- John Stuart Mill
- Julien Offray de La Mettrie
- Karl Friedrich Becker
- Karl Marx
- Laozi
- Leon Trotsky
- Library of Congress
- Library of Congress. Copyright Office
- Mahatma Gandhi
- Marcus Tullius Cicero
- Martin Luther
- Mary Macleod
- Michael Clarke
- Michel de Montaigne
- Moses Maimonides
- of Hippo Augustine
- Oxford University Press
- Paul Henri Thiry Holbach
- Peter Abelard
- Plato
- Plotinus
- Plutarch
- Prophet Muhammad
- Ptolemy
- R. W. Church
- René Descartes
- Roger J. Trienens
- Royal Society
- Sigmund Freud
- Swami Vivekananda
- Sándor Ferenczi
- Søren Kierkegaard
- the Elder Pliny
- Theodor Fontane
- Theophrastus
- Thomas Carlyle
- Thomas Henry Huxley
- Thomas Hobbes
- Thomas Jefferson
- Thomas Sprat
- Titus Lucretius Carus
- United States
- Various
- Virgil
- Vladimir Il'ich Lenin
- Voltaire