A study of the involvement of the Cistercian Order in the events surrounding the outbreak of heresy - particularly that of the Cathars and the resulting Albigensian Crusade - in southern France. Led by the example of Bernard of Clairvaux, Cistercian monks turned their attention to the world outside the monastery walls in response to the threat posed by heretical Christians, in particular the Cathars. The white monks, withother intellectuals, turned to pen, pulpit and popular preaching to counteract heresy, some accepting posts as bishops and papal legates, helping and even directing the...