How Did Christianity Spread AP World History?

Christianity is one of the world’s largest religions, with over two billion followers worldwide. It originated in the Middle East and has spread to all corners of the globe.

The spread of Christianity is a fascinating topic, and it has been studied extensively in AP World History. In this article, we will explore how Christianity spread throughout history.

The Early Spread of Christianity

Christianity began as a small sect in the Roman Empire. In its early days, it was persecuted by the Roman authorities, which saw it as a threat to their power. Despite this persecution, Christianity continued to grow, with many people attracted to its message of love and salvation.

One of the key factors that helped Christianity spread was the work of missionaries. These were people who traveled from place to place, spreading the message of Christianity and converting people. One famous example is Paul, who traveled throughout the Roman Empire and wrote many letters that are now part of the New Testament.

Another factor that helped Christianity spread was its appeal to people from different backgrounds. Unlike other religions at the time, Christianity did not discriminate based on social status or ethnicity. This made it attractive to people who were marginalized or oppressed.

The Conversion of Emperor Constantine

One of the most significant events in the history of Christianity was the conversion of Emperor Constantine in 312 CE. Constantine was a powerful ruler who had just won a major battle for control of Rome. According to legend, he saw a vision of a cross in the sky before his victory and took it as a sign from God.

After his conversion, Constantine made Christianity legal throughout the Roman Empire and even favored it over other religions. This gave Christians more freedom to practice their faith openly and helped to accelerate its spread.

The Role of Monasteries

In medieval Europe, monasteries played an important role in spreading Christianity. Monks lived in these communities and devoted their lives to prayer and worship. They also took on many practical tasks, such as farming, brewing beer, and providing healthcare.

Monasteries were often centers of learning, where monks would copy and preserve important texts. This helped to spread knowledge throughout Europe and preserve important documents from ancient times. Monks also acted as missionaries, traveling to distant lands to convert people to Christianity.

Colonialism and Globalization

In the modern era, Christianity has continued to spread through colonialism and globalization. European powers brought Christianity with them as they colonized other parts of the world. They often forced indigenous peoples to convert as part of their colonization efforts.

In more recent times, globalization has helped Christianity spread even further. Missionaries from all over the world travel to different countries to spread the message of Christianity. The internet has also made it easier for people to learn about Christianity and connect with other Christians around the world.


The spread of Christianity is a complex topic that has been shaped by many different factors throughout history. From the work of early missionaries to the impact of colonialism and globalization, Christianity has continued to grow and evolve over time. As one of the world’s largest religions, it will undoubtedly continue to play an important role in shaping our global culture for years to come.