Flint has dealt with the following antitheistic theories: atheism, materialism, positivism, secularism, pessimism, pantheism and (in a separate volume) agnosticism.
Flint, Theism, Antitheistic Theories, Agnosticism - all with valuable notes and references, and J.
Robert Flint published The Philosophy of History in Europe, Historical Philosophy in France; his volumes on Theism and Antitheistic Theories have passed through many editions.
The system of Democritus was altogether antitheistic. But, although he rejected the notion of a deity taking part in the creation or government of the universe, he yielded to popular prejudice so far as to admit the existence of a class of beings, of the same form as men, grander, composed of very subtle atoms, less liable to dissolution, but still mortal, dwelling in the upper regions of air.