"Jews, Christians, and Muslims in the Middle Ages were divided in many ways. But one thing they shared in common was the fear that God was offended by wrong belief. Medieval Heresies: Christianity, Judaism, and Islam is the first comparative survey of heresy and its response throughout the medieval world. Spanning England to Persia, it examines heresy, error, and religious dissent — and efforts to end them through correction, persuasion, or punishment — among Latin Christians, Greek Christians, Jews, and Muslims. With a lively narrative that begins in the late fourth century and ends in the early sixteenth century, Medieval Heresies is an unprecedented history of how the three great monotheistic religions of the Middle Ages resembled, differed from, and even interrelated with each other in defining heresy and orthodoxy."