The satisfaction theory of atonement is a theory in Catholic theology which holds that Jesus Christ redeemed humanity through making satisfaction for humankind's disobedience through his own supererogatory obedience. The theory draws primarily from the works of Anselm of Canterbury, specifically his Cur Deus Homo ("Why was God a man?"). It has been traditionally taught in the Roman Catholic tradition of Western Christianity. Since one of God's characteristics is justice, affronts to that justice must be atoned for. It is thus connected with the legal concept of balancing out an injustice.
Anselm regarded his satisfaction view of the atonement as a distinct improvement over the older ransom theory of atonement, which he saw as inadequate, due to its notion of a debt being owed to the devil. Anselm's theory was a precursor to the innovations of later theologians like John Calvin, who introduced the idea of Christ suffering the Father's just punishment as a vicarious substitute.