Researched by the Ignaria Editorial Team · Updated 2026-05-24
The doctrine of original sin — the idea that Adam's sin transmitted both guilt and a corrupted nature to all his descendants — is largely an Augustinian construction, though it builds on earlier traditions. Second-century Fathers like Irenaeus spoke of universal spiritual disinheritance through Adam's disobedience and employed recapitulation theology to explain how Christ's victory reverses what the first man's defeat accomplished. Augustine's reading of Romans 5:12 (in the Latin translation "in whom all sinned") anchored his account of inherited guilt during the Pelagian controversy, a position the Council of Carthage (418 AD) and later the Council of Orange (529 AD) ratified for Western Christianity. Medieval scholastics refined the doctrine's categories — Aquinas locating original sin in the soul rather than the flesh — and Calvin defined it as the hereditary depravation of a nature formerly good. The Council of Trent (1563) made the definition dogmatic, and the Formula of Concord (1577) articulated the Lutheran consensus on total corruption.
Biblical Foundation: Creation and the Universal Scope of the Fall
Scripture presents humanity as created in God's image with dominion over creation (Gen 1:26), establishing the original state of goodness from which the fall represented a comprehensive departure. Irenaeus drew out the universal scope of that fall through a legal analogy: as sons who disobey fathers are "disinherited by law though not by nature," so those who disobey God "have ceased to be His sons." The fall entails a loss of inheritance that extends across the entire human family. Scripture anticipates the corresponding remedy: Christ as the Son of man reverses Adam's defeat, so that "as our species went down to death through a vanquished man, so we may ascend to life again through a victorious one." Ephrem the Syrian captured the same scope from the Eastern tradition: "Adam sinned and earned all sorrows; likewise the world after his example, all guilt."
Patristic Witness: Transmission and the Bound Will
Early Christian writers affirmed the transmission of Adam's sin without the precise categories that later emerged from the Augustinian controversies. Tertullian argued that body and soul are "conceived, and formed, and perfectly simultaneously" — the whole person enters life under the conditions of the fallen nature from the first moment. Augustine's Confessions established the experiential foundation: even infants exhibit the disorder of self-will, showing that corruption precedes individual choice. Augustine also secured the scriptural basis against Manicheans who rejected the Old Testament: original sin is narrated there, and those who deny it must claim that apostolic epistles were corrupted. The critical controversy came with Pelagius, who held that sin corrupts by bad example rather than by transmission. His disciple Coelestius explicitly denied original sin and was condemned at Carthage; Augustine demonstrated that Pelagius "differs in no respect" from Coelestius on this question.
Medieval Scholastic Refinement
Peter Lombard candidly acknowledged the difficulty of the subject: "the saintly doctors have spoken somewhat obscurely, and the Scholastic doctors have held various positions." Yet he maintained that original sin possesses a reality preceding individual acts and affecting every human being from conception. Thomas Aquinas resolved the question of locus: "the soul is the subject of original sin, and not the flesh," because whatever accrues to the soul from the corruption of the first sin has the character of guilt, while what accrues to the flesh has the character of punishment. Thomas Watson expressed the federal logic that underlies transmission: "Adam being a representative person, while he stood, we stood; when he fell, we fell... as the children of a traitor have their blood stained." Watson also preserved Adam's responsibility: "His fall was voluntary. He had a posse non peccare, a power not to fall."
Reformation Articulations and the Council of Trent
Calvin defined the doctrine in relation to patristic precedent: "This is the hereditary corruption to which early Christian writers gave the name of Original Sin, meaning by the term the depravation of a nature formerly good and pure." He also observed that the medieval schools "have always gone from worse to worse, until at length, in their downward path, they have degenerated into a kind of Pelagianism" — framing the Reformation recovery of Augustine as a return to earlier orthodoxy. The Formula of Concord articulated the Lutheran consensus on scope: "the entire nature of man... is entirely and to the farthest extent corrupted and perverted by original sin, in body and soul, in all its powers." The Council of Trent (1563) issued the counter-Reformation definition, anathematizing those who denied that Adam's sin is "transfused into all by propagation, not by imitation" or that it requires any remedy other than Christ's merit applied through baptism.
What the primary sources show
"And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth."
"As our species went down to death through a vanquished man, so we may ascend to life again through a victorious one; and as through a man death received the palm [of victory] against us, so again by a man we may receive the palm against death."
"Pelagius really differs in no respect, on the question of original sin and the baptism of infants, from his follower Coelestius, who, refusing to acknowledge original sin and even daring to deny the doctrine in public, was condemned... for this question is not, as these heretics would have it, one wherein persons might err without danger to the faith."
"About original sin, the saintly doctors have spoken somewhat obscurely, and the Scholastic doctors have held various [positions]. According to the Sentences, however, original sin possesses a reality that precedes the acts of individual sinners, affecting each and every human being from the moment of conception."
"Since the soul can be the subject of guilt, while the flesh, of itself, cannot be the subject of guilt; whatever accrues to the soul from the corruption of the first sin, has the character of guilt, while whatever accrues to the flesh, has the character, not of guilt but of punishment: so that, therefore, the soul is the subject of original sin, and not the flesh."
"This is the hereditary corruption to which early Christian writers gave the name of Original Sin, meaning by the term the depravation of a nature formerly good and pure."
"The entire nature of man, which is born in the natural way of father and mother, is entirely and to the farthest extent corrupted and perverted by original sin, in body and soul, in all its powers, as regards and concerns the goodness, truth, holiness, and righteousness concreated with it in Paradise."
"If any one asserts, that this sin of Adam,--which in its origin is one, and being transfused into all by propagation, not by imitation, is in each one as his own,--is taken away either by the powers of human nature, or by any other remedy than the merit of the one mediator, our Lord Jesus Christ... let him be anathema."