Seven Centuries Without the Sword: Christianity’s Peaceful Witness Before the Islamic Invasions

This is a two-part presentation:

Part 1: Seven Centuries Without the Sword: Christianity’s Peaceful Witness Before the Islamic Invasions

Part 2: Europe’s Righteous Defense: The Crusades as a Necessary Response to Islamic Aggression and the Reclamation of Truth

For the first seven hundred years of its existence, Christianity stood apart from every other major faith or empire in history. It spread not by the edge of a blade, not by royal decree forcing conversion, not by conquest or coercion—but by preaching, personal example, charity, and the quiet power of transformed lives. From the crucifixion of Jesus around 30 AD until the Moorish invasion of Spain in 711 AD, there is simply no record of Christians launching holy wars, imposing the faith at sword-point, or organizing military campaigns to expand their religion. That fact alone deserves far more attention than modern academia usually gives it.

Let’s walk through the evidence, drawing from primary sources and clear-eyed historians who refuse to let political fashion rewrite the record.

The Founding Era: Preaching Over Power (30–312 AD)

These first three centuries were marked by intense, often savage persecution. Emperors like Nero (who scapegoated Christians for the Great Fire of Rome), Domitian, Decius, and especially Diocletian in the Great Persecution unleashed waves of arrests, torture, arena executions, and burnings. Christians were thrown to wild beasts, crucified, or used as living torches. Yet this era—precisely because it had no state power, no armies, and no ability to coerce anyone—is regarded by theologians and historians as the golden age of Christian evangelism.

The faith exploded outward anyway. From a tiny band of followers in Jerusalem, it grew to an estimated five to ten million believers across the empire by 300 AD. Rodney Stark’s groundbreaking sociological study documents consistent growth rates of roughly 40 percent per decade, driven entirely by personal witness: care for the poor, the sick, widows, and orphans; the radical dignity given to women and slaves; monogamous marriage; and the hope of eternal life lived out even under the shadow of death. Martyrdom itself became the most powerful sermon. No swords, no state backing, no forced conversions—just the Gospel preached and lived. Jesus’ command in the Sermon on the Mount (Matthew 5:38-44) to turn the other cheek, love enemies, and pray for persecutors was taken literally.

Primary documents confirm this pacifist witness. Tertullian, writing around 197 AD in Apologeticus, declared plainly that Christians “do not bear arms” and that “it is not lawful for the innocent to kill the guilty.” Origen, in the third century, taught that believers should refuse military service because the Gospel of peace superseded the sword. Christians served in Roman legions only as individuals, never as an organized “Christian army” seeking to impose their faith. This was evangelism at its purest—under fire, yet unstoppable.

Constantine, Theodosius, and the Christian Roman Empire (312–711 AD)

In 312 AD, Emperor Constantine’s victory at the Milvian Bridge led to the Edict of Milan in 313, which legalized Christianity. By 380 AD, Emperor Theodosius I issued the Edict of Thessalonica, making Nicene Christianity the official religion of the empire. At this point, critics often assume the “Christian empire” immediately began forcing conversions and launching religious wars.

The historical record shows otherwise.

Yes, there were anti-pagan laws and occasional temple closures (such as the Serapeum in Alexandria). But these were legal and administrative measures within an already-existing empire—not military conquests to spread the faith into new territories. Paganism faded over generations through persuasion, social pressure, and the superior appeal of Christian institutions, not through armies marching under the cross to convert at sword-point. Missionaries, monks, and bishops did the heavy lifting in places like Britain, Germany, and among the barbarian tribes. Conversion remained largely voluntary or cultural, not coerced by the sword.

Even more telling: the empire’s wars after Christianization were the same defensive or political struggles Rome had always fought—against Persians, Goths, Vandals, and Huns. They were not “crusades.” There were no papal calls to arms for holy conquest, no doctrine of “convert or die” applied to outsiders. The Byzantine Emperor Heraclius’s campaign against the Persians (622–628 AD) to recover the True Cross had religious overtones, but it was a desperate defensive war to reclaim lost Christian territory after a pagan empire had sacked Jerusalem. It was restoration, not expansionist jihad-style conquest.

Even Amid Barbarian Invasions: Augustine’s City of God (413–426 AD)

One of the most powerful pieces of evidence for Christianity’s non-violent character comes from the heart of this era. In 410 AD, the Visigoths under Alaric sacked Rome—the first time in 800 years the eternal city had fallen. Pagans immediately blamed the new Christian faith: “You abandoned the old gods, and now Rome suffers!” Many Christians themselves were shaken. They had endured losses, violence, and even the rape of women and virgins during the chaos. They asked the natural question: Why are we being attacked now that the empire is Christian? Where is God’s protection?

St. Augustine of Hippo answered with one of the greatest works in Christian history: The City of God. Written between 413 and 426 AD, this is not a call to arms, not a blueprint for conquest, and not a justification for holy war. It is a profound consolation and theological anchor for suffering believers. In the opening books (especially Book I), Augustine directly addresses the horrors Christians faced. He reassures the raped women that true chastity and virtue live in the will and soul, not the body—God sees their innocence and purity of heart. Physical violation does not stain the faithful. Suffering, he explains, is permitted for deeper reasons, but it never invalidates the Gospel.

The heart of the entire work is the contrast between the “Two Cities”: the earthly City of Man (temporary, passing, built on pride and doomed to fall—like Rome itself) and the City of God (the heavenly Jerusalem, eternal, built on love of God). Augustine tells Christians to stop pinning their hopes on worldly security or imperial power. Instead, find your comfort and ultimate victory in the City above. Endure, remain faithful, suffer as witnesses if necessary—but do not abandon the way of Christ. There is no summons to take up the sword, impose the faith by force, or launch retaliatory holy wars. The message is clear: remain true to the Gospel even as victims.

This document stands as towering proof that, even after Christianity became the empire’s religion, the faith’s core response to attack was patient endurance and heavenly hope—not violence or conquest. For centuries more, that witness held.

Rodney Stark, in The Rise of Christianity (1996), documents through sociology and demographics that the faith’s growth was driven by its appeal to women, the poor, and the marginalized—networks of trust and care—not state coercion. Thomas E. Woods Jr., in How the Catholic Church Built Western Civilization (2005), notes that even as the official religion, Christianity channeled its energy into building hospitals, monasteries, universities, and legal principles that would later define the West. The empire defended its borders; it did not launch faith-based invasions.

Then Came 711 AD—A Striking Contrast with Islam’s Origins

Everything changed when Islam arrived on the scene. In 711 AD, Muslim forces under Tariq ibn Ziyad crossed into Spain, rapidly overrunning the Visigothic Christian kingdom. Just twenty-one years later, in 732, they pushed into France—until Charles Martel and his Frankish warriors crushed them at the Battle of Tours (Poitiers). This was the first time Western Christians faced an explicitly religious military expansion that sought to impose a new faith and political order by the sword.

The contrast with Christianity’s growth could not be sharper. For the first thirteen years after Muhammad began preaching in Mecca (around 610 AD), growth was minimal—historical records show roughly 100 converts or fewer, despite years of proclamation. It was only after his migration to Medina in 622 AD—when he turned to military raids on caravans, promised war booty to his followers, and emerged as a warlord leading conquests and battles—that Islam began to recruit rapidly and expand through force. Within a century of his death in 632, Islamic armies had conquered two-thirds of the Christian world in the Middle East and North Africa by the sword.

For the preceding seven centuries, Christianity had known persecution, internal theological disputes, and the ordinary violence of imperial politics—but never the organized, ideologically driven conquest to spread the Gospel by force. The faith had proven it could win hearts without winning empires through violence.

Why This History Matters—and What Comes Next

This is not ancient trivia. It is the foundation for understanding how Christianity actually shaped the West: through reason, charity, law, science, and human dignity, not through the sword. Yet for decades, godless academia and popular culture have hammered us with a one-sided story—Inquisition! Crusades! Hypocrisy!—while airbrushing out the peaceful first seven centuries and the very real Islamic aggression that finally forced a response.

Europeans have been gaslit by their own universities and media. The contributions of Christianity to Western civilization—hospitals, universities, the scientific method’s foundations, the dignity of the individual, rule of law—get minimized or ignored, while every defensive action Christians eventually took gets portrayed as unprovoked aggression.

In Part 2 of this series, we will examine exactly that turning point: how Europeans finally had to fight back. We’ll look at Charles Martel’s stand, the centuries of Islamic raids and conquests that preceded the Crusades, and why the Crusades themselves were a defensive reclamation effort—not the cartoonish “imperialist land grab” of modern myth. We’ll re-examine the history with primary sources and honest scholarship.

Only by telling both halves of the story—the peaceful witness of seven centuries followed by the necessary defense against existential threat—can we see the profound truth: Christianity built the free and prosperous West not despite its teachings, but because of them. The misrepresentation in our institutions has gone on long enough. It’s time to set the record straight.

Sources used (neutral or right-leaning, or primary documents):

• New Testament (primary).

• Tertullian, Apologeticus (c. 197 AD, primary).

• Edict of Milan (313 AD) and Edict of Thessalonica (380 AD, primary).

• Augustine of Hippo, The City of God (c. 413–426 AD, primary document).

• Rodney Stark, The Rise of Christianity (HarperOne, 1996) and God’s Battalions (HarperOne, 2009).

• Thomas E. Woods Jr., How the Catholic Church Built Western Civilization (Regnery, 2005).

• Early Islamic biographical sources (Sira literature) for Muhammad’s Mecca and Medina periods.

Stay tuned for Part 2. The full picture changes everything.

Seven Centuries Without the Sword: Christianity’s Peaceful Witness Before the Islamic Invasions© 2026 byGeorge Bakalovis licensed underCC BY-NC-ND 4.0