Swiss-German theologian Kung planned this massive synthesis of Christian history and systematic theology as a sequel to his On Being Christian (1976) and as a companion to Judaism (Crossroad, 1992). Ever the Catholic Church's "faithful critic," Kung displays a dazzling breadth of scholarship. Professor of ecumenical theology at the University of Tubingen, he bases his approach on five historical paradigm shifts: Jewish apocalyptic Christianity, early church ecumenism, the Roman system in the medieval papal church, the Reformation, and modern democracy. He notes dominant influences in each,...