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What is the biggest religion in the world?

As of 2021, Christianity is the largest religion in the world, with an estimated 2.4 billion followers. Islam is the second-largest religion, with an estimated 1.9 billion followers. Hinduism, Buddhism, and Sikhism are also major world religions, with millions of followers. Christianity originated in the Middle East over 2,000 years ago and is based on […]

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