Metaphysics

The Philosophy of Natural Theology

Thoughts on Life and Religion

Creation or Evolution? A Philosophical Inquiry

Frameshifting

The Distinction between Mind and Its Objects

Philosophy in the Last Forty Years

Evolution of Life and Form

The Philosophy of Evolution

The Meaning of Evolution

Reincarnation: A Study in Human Evolution

Lectures on the Proofs of the Existence of God

The Three Critiques

Absurdities of Immaterialism Or, A Reply to T. W. P. Taylder's Pamphlet, Entitled, “The Materialism of the Mormons or Latter-Day Saints, Examined and Exposed.”

Ethics

Gospel Philosophy

Mind and Motion and Monism

Awakening Manny

The System We Live In

Time and Free Will

What Is Reality