How did St. Anselm of Canterbury’s satisfaction theory influence Roman Catholic and Protestant theology?

St. Anselm of Canterbury’s satisfaction theory of redemption, detailed in his work Cur Deus homo?, posits that because sin is an offense against an infinite God, finite humanity cannot provide the necessary recompense to restore justice. Anselm argued that only a being who was both fully God and fully human could offer the infinite satisfaction required through the death of Christ on the cross.1

This framework became a foundational element of Western theology. By shifting the focus away from the idea that humanity owed a debt to the Devil, Anselm’s doctrine established a comprehensive system centered on the relationship between God, Jesus, and humankind. With only minor modifications, this theory was adopted by the Latin church, serving as the basis for both Roman Catholic and orthodox Protestant understandings of the Atonement. It remains a central concept in scholastic theology, emphasizing that reconciliation requires vicarious satisfaction for human guilt.12