Today, 3.8 billion people in the world are either Christians and Muslims.

The two most powerful religions weren’t always the influential empires they are today. Two thousand years ago, there weren’t more than a pocketful of people who knew of their existence.

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To map out the extraordinary growth of Christianity and Islam, Western Conservatory of the Arts and Sciences created a video detailing two thousand years of expansion. Represented in white and green, Christianity and Islam morphed from tiny seeds in the cradle of Middle East into awe-inspiring dominions.

A description of the map from Western Conservatory’s website:

The Spread of the Gospel Map is a powerful visual depiction of the most important movement in history: the spread of Christianity. Charting the geographic progress of the Gospel over the last 2,000 years, this map shows the missionary journeys of the apostles, the outposts of the early church, the hotbeds of persecution, the staging grounds of the Church’s major theological battles, and more.

Besides detailing the spread of the two religions, the map also interjects color codes to denote the rise of the Roman Empire, Byzantine Empire, Mongol dominion, and the spread of Communism.

If you want to enjoy a slower version of the animation, you can watch the entire video spread out in 90 seconds.