Religion is the third and final volume in Robert Cummings Neville's systematic development of a new philosophical theology. Unfolding through his earlier volumes, Ultimates and Existence, and now in Religion, philosophical theology considers first-order questions generally treated by religious traditions through philosophical methods while reflecting Neville's long engagement with philosophy, theology, and Eastern and Western religious traditions. In this capstone to the trilogy, Neville provides a theory of religion and presents a sacred worldview to guide religious participation. His philosophical theory of value enlightens religions' approaches to ethics, spirituality, and religious institutional living and collaboration. With a detailed examination of plausibility conditions for sacred worldviews, the book concludes with an exploration of "religionless religion" for which institutions of religion are of penultimate value. Through the development of philosophical theology, Neville has built a unique, multidisciplinary, comparative, nonconfessional theological system, one that addresses concerns and provides tools for scientific and humanistic scholars of religion, postmodern thinkers, intellectuals from both secular and religious backgrounds, and those interested in the global state of religion today.