First version published with these philosophers:

Thales
Anaximander
Anaximenes
Pythagoras
Xenophanes
Heraclitus
Parmenides
Empedocles
Leucippus & Democritus
Zeno of Elea
Socrates
Plato
Aristotle
Diogenes
Pyrrho
Epicurus
Stoics (Zeno of Citium et al.)
Timon of Phlius
Plotinus
Saint Augustine
John Scotus Erigena
Saint Anselm
Thomas Aquinas
William of Ockham
Francis Bacon
Thomas Hobbes
René Descartes
Benedict Spinoza
John Locke
Gottfried Wilhelm Leibniz
George Berkeley
David Hume
Jean-Jacques Rousseau
Edmund Burke
Immanuel Kant
Jeremy Bentham
Johann Gottlieb Fichte
Friedrich Schelling
Georg Wilhelm Friedrich Hegel
Arthur Schopenhauer
John Stuart Mill
Søren Kierkegaard
Karl Marx
Charles Sanders Peirce
William James
Friedrich Nietzsche
Gottlob Frege
Edmund Husserl
Henri Bergson
John Dewey
Bertrand Russell
Ludwig Wittgenstein
Martin Heidegger
Karl Popper
Jean-Paul Sartre
Albert Camus
Maurice Merleau-Ponty
Michel Foucault