In this book, Huston Smith and David Ray Griffin propose religious philosophies to succeed the waning worldview of modernity. Huston Smith proposes the perennial philosophy or primordial tradition, and David Ray Griffin offers postmodern process theology. The ultimate issue debated is whether we should return to a traditional religious philosophy or seek a new never-before-articulated worldview. The debate covers the following issues: the relation of Christianity to other religions; the ultimate reality of a personal God in relation to a transpersonal absolute; the ultimate reality of time and progress; the problem of evil; the nature of immortality; the relation of humans to nature; the relation of science to theology; the relation of upward to downward causation; and the possibility of nonrelativistic criteria for deciding between competing worldviews.