know your heretics (from resurgence)

In the 5th century a debate arose between Pelagius, a British monk, and Augustine, the Bishop of Hippo in North Africa. They disagreed over the relationship between human nature after the Fall, as well as saving grace in Jesus Christ. 
Pelagius rejected the doctrines of original sin, substitutionary atonement, and justification by faith. Pelagius emphasized unconditional free will and the ability to better oneself spiritually without grace. This was in direct contrast to Augustine, who believed that humanity was completely helpless in Adam’s sin and in desperate need of grace.