A Pluralistic Universe — William James — William James's complete Hibbert Lectures on pluralism, radical empiricism, consciousness, religious experience, and a finite God.
A Preface to Morals — Walter Lippmann — Walter Lippmann examines moral life after the loss of inherited religious certainty and develops a modern humanist discipline of freedom and restraint.
Creative Evolution — Henri Bergson — Henri Bergson develops a philosophy of duration, life, instinct, intelligence, evolution, matter, and creative becoming.
Essays in Radical Empiricism — William James — William James's complete posthumous collection of twelve essays on pure experience, consciousness, relations, humanism, and truth.
God and the World — Arthur W. Robinson — Arthur W. Robinson surveys arguments concerning God, science, evolution, suffering, life, mind, and human freedom across nine chapters.
Life and Matter — Sir Oliver Lodge — Oliver Lodge critiques Ernst Haeckel’s monism and develops a historical argument about life, mind, matter, and guidance.
Naturalism and Religion — Rudolf Otto — Rudolf Otto examines naturalistic and religious worldviews in a complete twelve-chapter historical translation.
Reason, the Only Oracle of Man — Ethan Allen — Ethan Allen develops an American deist system of natural religion grounded in reason, nature, morality, and criticism of revelation.
Science and the Infinite — Sydney T. Klein — Sydney T. Klein develops a historical mystical metaphysics through eight views on perception, symbolism, space, time, and creation.
The Approach to Philosophy — Ralph Barton Perry — Ralph Barton Perry approaches philosophy through practical life, poetry, religion, science, metaphysics, knowledge, and systematic traditions.
The Ether of Space — Sir Oliver Lodge — Sir Oliver Lodge's complete 1909 account of the luminiferous ether, its experimental tests, and its proposed relation to matter.
The Meaning of Truth — William James — William James's complete sequel to Pragmatism, collecting fifteen essays and replies on truth, knowledge, humanism, and criticism.
Theism — Robert Flint — Robert Flint’s ten Baird lectures develop a systematic nineteenth-century philosophical defense of theism with an extensive appendix.
Theism and Humanism — Arthur James Balfour — Arthur James Balfour argues that aesthetic, ethical, and intellectual values require a theistic foundation across ten lectures.
Theism or Atheism — Chapman Cohen — Chapman Cohen presents a two-part freethought critique of theism and defenses of atheism across fifteen chapters.
Through Nature to God — John Fiske — John Fiske connects evolution, evil, altruism, moral development, and religious belief across three complete philosophical essays.