This book offers the first modern theory of religion. A deductive theory, beginning with seven axioms about human nature and the world humans inhabit, it derives hundreds of formal propositions about human religious behavior. Included are the origins of religion, the sources of religious commitment, the development of religious institutions, the emergence of religious movements, and the postulation of good and evil gods. Step by step, the authors explain the social processes of recruitment to a group, propagation of a faith, and competition between denominations. They show that secularization is a never-ending process in which particular faiths are discredited while new faiths arise to take their place. Thus, religion is an eternal human response to the conditions of existence, changing in form throughout history but always a vital part of culture and society.