Pillars of Civilization, Philosophical Tree of Humanitarian Knowledge

II. Complete Works of Plato
III. Complete Works of Aristotle
IV. Complete Works of Arthur Schopenhauer
V. Complete Works of René Descartes
VI. Complete Works of Friedrich Nietzsche
VII. Complete Works of Ludwig Wittgenstein
VIII. Complete Works of Georg Wilhelm Friedrich Hegel
IX. Complete Works of Confucius
X. Complete Works of Thomas Aquinas
XI. Complete Works of Bertrand Russell