Referring to data reported by ‘Statistics and Forecasts for World Religions: 1800-2025’, ‘Cagliero11’ highlighted that the world religions are divided as follows:
1. Christianity: 28.8% of the world's population (approximately 2.6 billion people) - 50% Catholic, 37% Protestant, 12% Orthodox and 1% other.
2. Islam: 25.6% of the world population (almost 2 billion followers).
3. Hinduism: 14.9% of the world population (about 1.2 billion people).
4. Buddhism: 7% of the world population (about 500 million practitioners).
About 1.4 billion people (16% of the world population) have no religious affiliation, making them the third largest group after Christians and Muslims.
