Religion is a collection of cultural systems, beliefs and world views that establishes symbols relating humanity to spirituality and often to moral values.
The word religion is sometimes used interchangeably with "faith" or "belief system" but religion differs from private belief in that it has a public aspect. Most religions have organized behaviors including clerical hierarchies, a definition of what constitutes adherence or membership, congregations of laity, regular meetings or services for the purposes of veneration of a deity or for prayer, holy places (either natural or architectural) or religious texts.
According to some estimates, there are roughly 4,200 religions in the world. The word religion is sometimes used interchangeably with "faith" or "belief system", but religion differs from private belief in that it has a public aspect.
The world's 7 largest religions and their number of believers are:
1.Christianity (2.1 billion)
2.Islam (1.3 billion)
3.Non religious (Secular/Agnostic/Atheist) (1.1 billion)
4.Hinduism (900 million)
5.Chinese traditional religion (394 million)
6.Buddhism 376 million.
7.Primal-indigenous (300 million).