Is Christian truth unchanging? Can it develop over time? To what extent may the Catholic community jettison or modify earlier beliefs? Should it embrace insights from other cultures or revise its views on matters such as the status of women or church-state relations? In this wide-ranging and provocative book, John Rist brings his expertise in ancient philosophy, theology and history to bear on these questions as they relate to Roman Catholicism and to human society at large, both in the early Christian centuries and in our own times.