What ideas and traditions coincided to form early Christianity? Gregory J. Riley, professor of New Testament and Early Christianity at Claremont Graduate School of Theology, explains how Christianity formed during its early days. In his view, Christianity is not a revealed religion, but rather one that built upon the teachings of Jesus, as well as what came before--Judaism, Zoroastrianism, and the best ideas from the Graeco-Roman and Ancient Egyptian worlds. Gregory J. Riley joins host Larry Mantle to navigate this "river" of god. Gregory Riley's book is called The River of God: A New History of Christian Origins (Harper)