Original Sin (Augustine's Doctrine)
Original Sin is Augustine's theological doctrine, developed against the British monk Pelagius's teaching that humans can achieve salvation through their own free will and moral effort, which holds that Adam's disobedience in Eden transmitted a corrupted nature to all subsequent humanity: humans are constitutionally incapable of choosing good without divine grace, and this incapacity is inherited biologically (through sexual reproduction) rather than chosen individually, making grace and predestination, not human effort, the sole path to salvation.
The Pelagian controversy (early 5th century CE) was one of early Christianity's most consequential theological disputes, and Augustine's victory in it permanently shaped Western Christianity's anthropology. Pelagius, a British monk of considerable learning and genuine piety, taught that God's justice required that humans have genuine freedom to choose between good and evil: if God commands righteousness and punishes sin, humans must be capable of righteousness. Grace assists this natural moral capacity but does not replace it. Humans are not born corrupted; they sin by free choice and can choose to stop sinning.
Augustine's counter-argument drew on his own experience (documented in the Confessions): despite his best efforts, he found himself unable to resist sexual desire and other appetites. The will is not free; it is enslaved to desire. The origin of this enslavement is Adam's fall: when Adam disobeyed God in Eden, he transmitted not just the consequences of sin (death, suffering) but a fundamentally corrupted will to all his descendants. This corruption is transmitted through sexual reproduction, Augustine believed the sexual desire involved in reproduction was itself the vehicle of transmission, making it universal and inescapable. Salvation therefore cannot be earned; it can only be received as divine gift (grace) freely given to those God has predestined for salvation.
The institutional and political consequences were enormous. Augustine's doctrine of predestination, that God has eternally predetermined who will be saved and who will be damned, independent of their merits, appears to make moral effort irrelevant. Augustine's sophisticated response (we cannot know our own predestination, so we must act as if our choices matter) is psychologically unstable, and the doctrine produced centuries of controversy culminating in Calvin's rigorous systematization. Predictive History connects Augustinian original sin to Weber's Protestant Ethic: if you cannot know you are saved, the anxiety this creates drives the compulsive work and rational self-discipline that Weber identified as capitalism's cultural foundation.
Related articles
Related terms
Frequently asked questions
What is Augustine's doctrine of original sin? ＋
Adam's disobedience transmitted a corrupted, slavery-to-desire nature to all humans through sexual reproduction, making genuine moral freedom impossible without divine grace. Augustine developed this against Pelagius (who said humans could choose good by free will). The implication: salvation is God's predestined gift, not human achievement. This doctrine of predestination was systematized by Calvin and connected by Max Weber to the Protestant work ethic: anxiety about predestination drives compulsive rational labor as evidence of divine election.