1902. Tuttle's works are characterized by deep philosophical thought and a sincerity of tone that appeals to the judgment and gains the confidence of the reader in the author's integrity and good purpose. This is a book for thinkers and truth seekers. Contents: Religion of Man: religion; what is religion; fetishism; phallic worship; man's moral progress dependent on his intellectual growth; great theological problems; man's fall; duties and obligations of man to God and himself; Ethics of Science: individual; genesis and evolution of spirit; law of moral government; appetites; selfish propensities; love; wisdom; charter of rights; duties and obligations of the individual and society; rights of government; duties of society to criminals; duty of self culture; marriage.