Original Sin

The Catholic claim

By original sin, human nature is deprived of original holiness and justice: we are not born as blank-slate innocents untouched by the Fall, and we need Baptism and grace. Christ is the new Adam who conquers what the first Adam lost (CCC 396).

The doctrine does not say infants personally willed Adam’s act; humanity fell as a family, and every member needs healing. That explains both dignity—we remain God’s image—and brokenness: concupiscence, ignorance, and death. It does not make God the author of our evil choices.

Catechism of the Catholic Church
CCC 396
CCC 397
“God created man in his image and established him in his friendship. A spiritual creature, man can live this friendship only in free submission to God.…”
Test
“Man, tempted by the devil, let his trust in his Creator die in his heart and, abusing his freedom, disobeyed God's command. This is what man's first sin consisted of.…”
Fall

Biblical evidence

Genesis recounts the Fall: distrust, the grasping at a good apart from God, and the wounds that follow—shame, exile, death (Genesis 3:1–19). Paul teaches that sin and death entered through one man, and that Christ’s obedience brings righteousness to the many (Romans 5:12–19). That parallel is the spine of the doctrine: solidarity in Adam, solidarity in Christ. “As in Adam all die, so in Christ shall all be made alive” (1 Corinthians 15:21–22). David’s confession, “in sin did my mother conceive me,” and Paul’s picture of being dead in trespasses until God made us alive, fit the same moral realism: we need grace from the start, not only after our first private crime (Psalm 51:5; Ephesians 2:1–5).

Genesis 3:1-19
“Now the serpent was more subtle than any animal of the field which Yahweh God had made. He said to the woman, “Has God really said,”
Romans 5:12-19
“Therefore as sin entered into the world through one man, and death through sin; and so death passed to all men, because all sinned.”
1 Corinthians 15:21-22
“For since death came by man, the resurrection of the dead also came by man. For as in Adam all die, so also in Christ all will be made alive.”
Psalm 51:5
“Behold, I was born in iniquity. In sin my mother conceived me.”
Ephesians 2:1-5
“You were made alive when you were dead in transgressions and sins, in which you once walked according to the course of this world,”

Sacred Scripture
1 Corinthians 15:21-22
Ephesians 2:1-5
“For since death came by man, the resurrection of the dead also came by man. For as in Adam all die, so also in Christ all will be made alive.”
Scripture
“You were made alive when you were dead in transgressions and sins, in which you once walked according to the course of this world,”
Scripture

Tradition and magisterium

The Catechism distinguishes original sin, a contracted state, from personal sin, an act. Trent defends the doctrine against denials that empty Baptism and the Cross of meaning by pretending human nature needs no Savior from birth.

Original sin explains both dignity—we remain God’s image—and brokenness: concupiscence, ignorance, and death. It does not make God the author of our evil choices; it names the wounded solidarity we inherit in Adam and the healing we receive in Christ.

Catechism of the Catholic Church
CCC 405
“Although it is proper to each individual, original sin does not have the character of a personal fault in any of Adam's descendants. It is a deprivation of original holiness and justice,…”
Transmission
Hermas
The Shepherd 4:3:1–2 · c. A.D. 140
A book of visions used in some early churches.
Written at Rome: one repentance after baptism, and a call to ask God without sloth.
“‘I have heard, sir,’ said I, ‘from some teacher, that there is no other repentance except that which took place when we went down into the water and obtained the remission of our former sins.’ He said to me, ‘You have heard rightly, for so it is’”
Fathers
Justin Martyr
First Apology 61:14–17 · A.D. 151
An apology to Emperor Antoninus Pius.
A public defense of Christian worship, morals, baptism, and the Sunday Eucharist.
“Whoever are convinced and believe that what they are taught and told by us is the truth, and professes to be able to live accordingly, are instructed to pray and to beseech God in fasting for the remission of their former sins, while we pray and fast with them. Then they are led by us to a place where there is water…”
Fathers

History and development

Augustine articulated the Western vocabulary against Pelagius, who treated grace as a helpful extra rather than a necessity from birth. The East emphasizes ancestral mortality and healing. The Catholic Church holds the core: a real Fall and a real Redeemer. How biology describes mechanisms of development is not the same question as whether there was a real first human disobedience with consequences for all.

Orthodox writers often prefer “ancestral sin”: Adam brings death and a wounded condition, without saying infants inherit his personal choice. Catholics agree they did not choose that act, and still name a real deprivation of holiness that Baptism remits. Much of the remaining heat is semantic.

The Letter of Barnabas
Letter of Barnabas 11:1–10 · c. A.D. 80–120
A general epistle; no named church or person.
It teaches the ‘two ways’ and how to read the Old Testament in Christ.
“Regarding [baptism], we have the evidence of Scripture that Israel would refuse to accept the washing which confers the remission of sins and would set up a substitution of their own instead [Ps. 1:3–6]. Observe there how he describes both the water and the cross in the same figure. His meaning is, ‘Blessed are those who go down into the water with their hopes set on the cross.’ Here he is saying that after we have stepped down into the water, burdened with sin and defilement, we come up out of it bearing fruit, with reverence in our hearts and the hope of Jesus in our souls”
Hermas
The Shepherd 4:3:1–2 · c. A.D. 140
A book of visions used in some early churches.
Written at Rome: one repentance after baptism, and a call to ask God without sloth.
“‘I have heard, sir,’ said I, ‘from some teacher, that there is no other repentance except that which took place when we went down into the water and obtained the remission of our former sins.’ He said to me, ‘You have heard rightly, for so it is’”
Second Clement
Second Clement 6:7–9 · A.D. 150
An anonymous sermon, not by Clement of Rome.
It exhorts hearers to keep their baptism pure by doing the will of Christ.
“For, if we do the will of Christ, we shall find rest; but if otherwise, then nothing shall deliver us from eternal punishment, if we should disobey his commandments. . . . [W]ith what confidence shall we, if we keep not our baptism pure and undefiled, enter into the kingdom of God? Or who shall be our advocate, unless we be found having holy and righteous works?’”
Justin Martyr
First Apology 61:14–17 · A.D. 151
An apology to Emperor Antoninus Pius.
A public defense of Christian worship, morals, baptism, and the Sunday Eucharist.
“Whoever are convinced and believe that what they are taught and told by us is the truth, and professes to be able to live accordingly, are instructed to pray and to beseech God in fasting for the remission of their former sins, while we pray and fast with them. Then they are led by us to a place where there is water, and they are reborn in the same kind of rebirth in which we ourselves were reborn: ‘In the name of God, the Lord and Father of all, and of our Savior Jesus Christ, and of the Holy Spirit,’ they receive the washing of water. For Christ said, ‘Unless you be reborn, you shall not enter the kingdom of heaven’”

Mastery and practice

Define original sin without saying babies personally committed Adam’s act: it is a deprived state, a wounded nature inherited in solidarity with the race. Connect it to Baptism: the sacrament is not a compliment to a fine natural condition; it is new birth for those who need it from the start. Then explain concupiscence: the pull toward sin that remains after Baptism, which is not itself a personal sin, but which we must fight.

Define original sin without saying babies personally committed Adam’s act.
Connect original sin to Baptism.
Explain concupiscence.

Catechism of the Catholic Church
CCC 396
CCC 397
“God created man in his image and established him in his friendship. A spiritual creature, man can live this friendship only in free submission to God.…”
Test
“Man, tempted by the devil, let his trust in his Creator die in his heart and, abusing his freedom, disobeyed God's command. This is what man's first sin consisted of.…”
Fall

Common objections

It is unfair to inherit Adam’s guilt.

Catholic teaching speaks of a deprived state and need for grace, not that infants personally willed Adam’s act or carry his private malice like a courtroom transfer. We inherit a wounded human condition in solidarity with the race, just as we inherit grace in solidarity with Christ (Romans 5). Unfairness objections often picture God blaming babies for someone else’s choice. The doctrine is closer to this: humanity fell as a family, and every member needs healing. Inheritance of a broken condition is not identical to inherited personal guilt in the vulgar sense. Solidarity cuts both ways—in Adam and in Christ.

Evolution disproves Adam and Eve.

The Church requires a real origin of the human race’s fallen condition and rejects accounts that empty original sin of meaning. Polygenism that dissolves the unity of the Fall was warned against for that reason. How biology describes mechanisms of development is not the same question as whether there was a real first human disobedience with consequences for all. Science can map genetics; it cannot tell you whether the soul or the Fall is real. Catholics can engage evolutionary science without treating Genesis as a lab report, or treating population genetics as a catechism. Keep the layers distinct; do not flatten them.

People are basically good.

People remain God’s image, capable of real good, friendship, and sacrifice, and still need salvation. Catholic anthropology is hopeful without being naive: concupiscence, the record of history, and your own divided heart all testify that something is wounded. “Basically good” cannot explain the depth of evil or why the Cross was necessary. Pelagian optimism flatters us; despair about human nature does not fit the Incarnation either. We are good creatures gone wrong: able to love, unable to heal ourselves completely. That is why Baptism and grace are not optional compliments to a fine natural state.

Original sin is a Latin invention alien to the East.

The East baptizes infants and reads Romans 5. Vocabulary differs—ancestral sin, corruption, death—but denial of any inherited Adamic wound is not classical Orthodoxy. Catholic dogma specifies deprivation of holiness and justice, compatible with strong Eastern stress on mortality. Augustine’s influence on Latin precision is real; inventing the whole problem is not. If the East had no doctrine here, infant baptism for the remission of sin would be an unexplained ritual.

Sources

Citations for this article. Browse the full bibliography to see every place each source is used across the library.

Catechism

CCC 396

Man tested in paradise

God created man in his image and established him in his friendship. A spiritual creature, man can live this friendship only in free submission to God.…

CCC 396. Test

Open source Also in bibliography

Catechism

CCC 397

Man’s first sin

Man, tempted by the devil, let his trust in his Creator die in his heart and, abusing his freedom, disobeyed God's command. This is what man's first sin consisted of.…

CCC 397. Fall

Open source Also in bibliography

Catechism

CCC 405

Transmission of original sin

Although it is proper to each individual, original sin does not have the character of a personal fault in any of Adam's descendants. It is a deprivation of original holiness and justice,…

CCC 405. Transmission

Open source Also in bibliography

Scripture