Publisher's Synopsis
Volume I, Substance, contains, under the heading Substance, the writings of Plato, Plotinus, Boethius, Marsilio Ficcino, Tommaso Campanella, Johannes Kepler, Arthur Schopenhauer, Friedrich Nietzsche, and Feruccio Busoni. Under the heading Essence and Distinctness are found the writings of Aristotle, Aristoxenus, Philodemus, Immanuel Kant, Friedrich W.J. Schelling, George W.F. Hegel, Johann Herbart, and Eduard Hanslick.
