Epistemology

The Observations of Professor Maturin

The Meaning of Truth

From Rome to Rationalismor: Why I Left the Church

Sophist

Leibniz's New Essays Concerning the Human Understanding: A Critical Exposition

The Opinions of a Philosopher

Modern Rationalism

Manhood of Humanity

The Philosophy and Theology of Averroes

Creation or Evolution? A Philosophical Inquiry

The Jumble Book: A Jumble of Good Things

Some Turns of Thought in Modern Philosophy

Essays in Radical Empiricism

M. Cousin's Course of Philosophy

Modern Skepticism: A Journey Through the Land of Doubt and Back Again

Our Intellectual Strength and Weakness

Aphorisms and Reflections from the Works of T. H. Huxley

On the Improvement of the Understanding

Thinking as a Science

Civilization