persecution, but it was not systematic. There is reason to think that in the pursuit of heresy the Church was mainly guided by considerations of its temporal interest, and was roused to severe action only when the spread of false doctrine threatened to reduce its revenues or seemed a menace to society. At the end of the twelfth century Innocent III became Pope and under him the Church of Western Europe reached the height of its power. He and his immediate successors are responsible for imagining and beginning an organized movement to sweep heretics out of Christendom. Languedoc in Southwestern France was largely populated by heretics, whose opinions were considered particularly offensive, known as the Albigeois. They were the subjects of the Count of Toulouse, and were an industrious and respectable people. But the Church got far too little money out of this anti-clerical population, and Innocent called upon the Count to extirpate heresy from his dominion. As he would not obey, the Pope announced a Crusade against the Albigeois, and offered to all who would bear a hand the usual rewards granted to Crusaders, including absolution from all their sins. A series of sanguinary wars followed in which the Englishman, Simon de Montfort, took part. There were
