Christianity has had a major impact on Western Civilization. In the early days, political leaders in Rome persecuted Christians, brutally and mercilessly. Roman emperor Constantine applied Caesaro-Papism to the Eastern half of the Empire. He also meddled in the church, which led to some problems within the church after his death. The pope used their power to encourage the first five Crusades that ended up failing to accomplish the original goal set. Christianity and politics have been intertwined