Thousands of religions have adherents today, and countless more have existed throughout history. What accounts for this astonishing diversity? This extraordinarily ambitious and comprehensive book demonstrates how evolutionary systematics and philosophy can yield new insight into the development of organized religion. Lance Grande—a leading evolutionary systematist—examines the growth and diversification of hundreds of religions over time, highlighting their historical interrelationships. Combining evolutionary theory with a wealth of cultural records, he explores the formation, extinction, and diversification of different world religions, including the many branches of Asian cyclicism, polytheism, and monotheism.

Grande deploys an illuminating system of evolutionary trees to illustrate historical interrelationships among the world's major religious traditions, rejecting colonialist and hierarchical "ladder of progress" views of evolution. The Evolution of Religions marshals compelling evidence, starting far back in time, that all major belief systems are related, despite the many conflicts that have taken place among them. By emphasizing these broad historical interconnections, this book promotes the need for greater tolerance and deeper, unbiased understanding of cultural diversity. Such traits may be necessary for the future survival of humanity.