1 What is the source of quarrels and conflicts among you? Is not the source your pleasures that wage war in your members? 2 You lust and do not have; so you commit murder. You are envious and cannot obtain; so you fight and quarrel. You do not have because you do not ask. James 4:1-4 (NASB) (Read verses 3-4 on the site)
The Church since its inception in the 1st Century AD has been plagued by quarrels, disagreements, feuds, splits, et cetera. According to God, the problem is not with the Gospel of our Lord Jesus Christ or His doctrines, but with the fact that people in the Church are not submitted properly to Him or to each other. Pride is behind most disagreements just as it is behind those who break away from the truth to lead their followers with false doctrines and a focus that is on self rather than on God and His glory. Instead, those who cause these problems are in love with self and, therefore, in love with the world, its ways, and the things of the world.