Major religious groups
The 2020 global percentage of adherents by religion.
- Christianity (28.8%)
- Islam (25.6%)
- Unaffiliated (24.2%)
- Hinduism (14.9%)
- Buddhism (4.10%)
- Other religions (2.40%)
The world's principal religions and spiritual traditions may be classified into a small number of major groups, though this is not a uniform practice. This theory began in the 18th century with the goal of recognizing the relative degrees of civility in different societies, but this concept of a ranking order has since fallen into disrepute in many contemporary cultures.