It has been said that Innocent III shared the popular belief existing at the beginning of the thirteenth century that the world would end in 1284. Perhaps this is the reason why throughout his pontificate he was eager to resolve the divisions facing mankind. These divisions were reflected in the deviations of the heretic, the beliefs of the infidel and the schism of the eastern church. In the first of these Innocent was meeting success, albeit in varying degrees, for example in Languedoc. The second and third needed his further attention. He was of the opinion that a renewed crusading effort in both east and west would be able to achieve mass conversions amongst Jews and Muslims. To this end the fourth crusade of 1204, mounted mainly by the Cistercians, came into being.
