The historical breadth of Boswell's research (from the Greeks to Aquinas) and the variety of sources consulted (legal, literary, theological, artistic, and scientific) make this one of the most extensive treatments of any single aspect of Western social history. The product of ten years of research and analysis of records in a dozen languages, this book opens up a new area of historical inquiry and helps elucidate the origins and operations of intolerance as a social force.