Feuerbach: The roots of the socialist philosophy

The Symbolism of Freemasonry / Illustrating and Explaining Its Science and Philosophy, Its Legends, Myths and Symbols

The Philosophy of the Moral Feelings

The Psychology of Revolution

A Short History of Greek Philosophy

Logic / Deductive and Inductive

The Philosophy of Mathematics

The Approach to Philosophy

Five Stages of Greek Religion

Three Philosophical Poets / Lucretius, Dante, and Goethe

Christianity and Greek Philosophy / or, the relation between spontaneous and reflective thought / in Greece and the positive teaching of Christ and His / Apostles