LUCRETIUS: _On the Nature of Things._ Translation by Munro. (Early
materialism.)
HOBBES: _Metaphysical System._ Edited by Calkins. _Leviathan_, Part I.
(Modern materialism.)
* * * * *
BUECHNER, LOUIS: _Force and Matter._ Translation by Collingwood.
(Nineteenth century materialism.)
JANET, PAUL: _Materialism of the Present Day._ Translation by Masson.
LANGE, F. A.: _History of Materialism._ Translation by Thomas.
HAECKEL, ERNST: _The Riddle of the Universe._ Translation by McCabe.
("Monism of Energy.")
CLIFFORD, W. K.: _Lectures and Essays: The Ethics of Belief; Cosmic
Emotion; Body and Mind._ (Positivism.)
HUXLEY, T. H.: _Evolution and Ethics; Prolegomena._ (Distinguishes
between the moral and natural.) _Science and Hebrew Tradition_; _Science
and Christian Tradition_. (Controversies of the naturalist with
Gladstone and Duke of Argyle.)
SPENCER, HERBERT: _First Principles._ (The systematic evolutionary
philosophy.) _Principles of Ethics._ (Ethics of naturalism.) _The Nature
and Reality of Religion._ (Controversy with Frederick Harrison.)
BALFOUR, A. J.: _Foundations of Belief_, Part I. (On the religious,
moral, and aesthetic consequences of naturalism.)
PATER, WALTER: _Marius the Epicurean._ (Refined hedonism.)
ROMANES, G. J.: _Thoughts on Religion._ (Approached from stand-point of
science.)
BENTHAM, J.: _Introduction to the Principles of Morals and
Legislation._ (Utilitarian.)
STEPHEN, L.: _Science of Ethics._ (Evolutionary and social.)