Major religious groups
The world's principal religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

s and spiritual traditions may be classified into a small number of major groups, although this is by no means a uniform practice. This theory began in the 18th century with the goal of recognizing the relative levels of civility in non-European societies.

For a more comprehensive list of religions and an outline of some of their basic relationships, please see the article list of religions.
In world cultures, there have traditionally been many different groupings of religious belief.