Why Were Early Christians Called Atheists?

Early Christians were sometimes called atheists—not because they believed in no God, but because they rejected the many gods worshiped throughout the Greco-Roman world. Their exclusive allegiance to the one true God and to Jesus Christ could look irreligious, even socially dangerous, in cultures where honoring civic gods and the emperor was woven into public life. The accusation reveals how costly Christian worship could become: believers would honor rulers, but they would worship only God.

Why were early Christians called atheists?

In the ancient Roman world, “atheist” did not always carry its modern meaning of someone who denies that any god exists. It could function as an accusation against people who rejected the recognized gods, their images, sacrifices, and public worship.

Christians clearly believed in God. But they denied that the gods represented by idols were worthy of worship. They also refused to treat the emperor as divine. To some neighbors and officials, Christians therefore appeared to be rejecting religion itself.

Justin Martyr, a Christian teacher writing in the second century, directly answered this accusation. In First Apology 6, he wrote:

“Hence are we called atheists. And we confess that we are atheists, so far as gods of this sort are concerned, but not with respect to the most true God.”

Justin was not admitting atheism in the modern sense. He was deliberately turning the charge around: if “atheist” meant refusing false gods, he accepted the label in that sharply qualified sense—but Christians worshiped “the most true God.” He went on to identify Christian worship in relation to the Father, the Son, and the prophetic Spirit.

This accusation was real, but it should not be overstated. Not every Roman called Christians atheists, and persecution was not equally intense in every place or period. Nevertheless, surviving Christian texts show that the charge could be used against believers because of their refusal to participate in accepted worship.

Why did refusing the Roman gods matter so much?

Religion in the Roman world was not treated as merely private conviction. Sacrifices, festivals, temples, civic offices, households, and public expressions of loyalty could all have religious dimensions. Honoring the gods was often associated with the peace and well-being of the community.

A Christian might appear stubborn or disloyal by refusing acts that others regarded as ordinary civic duty. The issue was not usually that Christians denied the existence of every spiritual power. It was that they denied those powers the worship belonging to the Creator alone.

The book of Acts shows the collision between Christian proclamation and a city filled with objects of worship. When Paul arrived in Athens, “his spirit was provoked within him as he saw the city full of idols” (Acts 17:16). Some philosophers misunderstood his preaching and said, “He seems to be advocating foreign deities,” because Paul proclaimed Jesus and the resurrection (Acts 17:18).

Paul did not respond by adding Jesus to the city’s collection of gods. He proclaimed the one Creator:

“The God who made the world and all things in it, he, being Lord of heaven and earth, doesn’t dwell in temples made with hands. He isn’t served by men’s hands, as though he needed anything, seeing he himself gives to all life and breath and all things.” —Acts 17:24–25

This overturned the religious assumptions around him. God is not a local deity housed and sustained by human beings. He is the Lord who gives life to everyone. Nor can his divine nature be reduced to a crafted object:

“Being then the offspring of God, we ought not to think that the Divine Nature is like gold, or silver, or stone, engraved by art and design of man.” —Acts 17:29

Christian preaching was therefore both positive and exclusive. Paul announced the living God, called everyone to repentance, and proclaimed that God had raised Jesus from the dead and appointed him to judge the world (Acts 17:30–31). Some mocked, some wanted to hear more, and some believed. Christianity did not offer one more cult among many; it announced the risen Lord to whom all people owe allegiance.

Christian refusal of idols came from Scripture

The early Christians’ position was not a bid to appear rebellious. It flowed from God’s command to worship him alone. After reminding Israel that he had rescued them from slavery, the Lord declared:

“You shall have no other gods before me. You shall not make for yourselves an idol, nor any image of anything that is in the heavens above, or that is in the earth beneath, or that is in the water under the earth: you shall not bow yourself down to them, nor serve them.” —Exodus 20:3–5

The command begins with grace: God had already delivered his people. Exclusive worship was their faithful response to the God who saved them.

The apostle Paul applied that same loyalty to Christians living among pagan temples. He told the Corinthian church, “Therefore, my beloved, flee from idolatry” (1 Corinthians 10:14). Participation in worship was not empty theater to him. It expressed fellowship and allegiance.

Paul contrasted the Lord’s table—the Christian sharing in the bread and cup—with pagan sacrificial tables:

“You can’t both drink the cup of the Lord and the cup of demons. You can’t both partake of the table of the Lord and of the table of demons.” —1 Corinthians 10:21

A Christian could not escape pressure by saying that an outward sacrifice meant nothing. Worship belongs to God, and participation communicates belonging. This made apparently small compromises matters of fidelity to Christ.

Polycarp shows how costly the accusation could become

The Martyrdom of Polycarp gives a concrete example. Polycarp was an elderly Christian leader and bishop of Smyrna in Asia Minor. According to the account, he was brought into a stadium before a Roman proconsul and pressured to renounce Christ.

The official urged him to swear by Caesar’s fortune and say, “Away with the Atheists.” Polycarp instead looked toward the hostile crowd, gestured toward them, and repeated the words: “Away with the Atheists.” He redirected the charge toward those who rejected the true God.

The proconsul then offered him liberty if he would reproach Christ. Polycarp replied:

“Eighty and six years have I served Him, and He never did me any injury: how then can I blaspheme my King and my Saviour?” —The Martyrdom of Polycarp 9

When pressed again to swear by Caesar’s fortune, he answered, “I am a Christian” (The Martyrdom of Polycarp 10).

This was not hostility toward civil government as such. In the same exchange, Polycarp said Christians had been taught to give proper honor to governing authorities. His distinction was the crucial one: Caesar could receive due civil honor, but he could not receive worship or an oath that compromised allegiance to Christ.

Did Christians refuse all loyalty to Rome?

Christians distinguished submission to government from worship of government. Paul instructed believers:

“Therefore give everyone what you owe: if you owe taxes, pay taxes; if customs, then customs; if respect, then respect; if honor, then honor.” —Romans 13:7

Christians were to pay what they owed, do good, respect authority, and live with a clear conscience. Yet the state’s authority was not absolute. Romans 13 itself says governing authority exists under God. A ruler is not God and cannot rightfully claim what belongs to God.

This distinction helps explain why Christians could be peaceful citizens and still face punishment. They could pay taxes and honor officials while refusing sacrifice, emperor worship, or any command to deny Christ. Their refusal was not political self-assertion; it was obedience to a higher King.

Daniel 3 provides an Old Testament pattern. Shadrach, Meshach, and Abednego served within Babylon’s government, but when commanded to worship the king’s golden image, they answered:

“But if not, let it be known to you, O king, that we will not serve your gods or worship the golden image which you have set up.” —Daniel 3:18

They did not know whether God would spare their lives, but they knew whom they could not worship. Polycarp’s confession displays the same kind of fidelity: respect for authority without idolatry, and trust in God even when obedience becomes dangerous.

What the “atheist” accusation reveals about Christian worship

The surprising label exposes a permanent feature of Christian faith. Christians do not merely believe that a divine being exists. They confess the God who created all things, revealed himself in Scripture, sent his Son for our salvation, and raised Jesus bodily from the dead.

That confession necessarily excludes idols. Jesus cannot be added to a collection of competing lords, because he is the risen King and Savior. Christian worship is exclusive not because Christians are trying to be socially difficult, but because God alone is God and salvation is found in Christ.

The accusation also helps explain the New Testament’s teaching about suffering. First Peter distinguishes suffering for wrongdoing from suffering because one belongs to Christ:

“But if one of you suffers for being a Christian, let him not be ashamed; but let him glorify God in this matter.” —1 Peter 4:16

Early Christians could be called irreligious precisely because they would not perform religion on the world’s terms. Their answer was not that worship did not matter. Their answer was that worship mattered too much to give it falsely.

To confess Christ as King meant that no idol, crowd, or ruler could occupy his place. The old accusation of atheism was therefore profoundly mistaken, but it pointed unintentionally toward the heart of Christian allegiance: believers reject the gods made or exalted by human beings because they know and worship the true God.