1. Christianity (2.1 billion adherents)
Christians believe that in 4 BC, the Son of God was born. He is Jesus Christ who brought salvation for humanity. The story of his life was written in a Bible which becomes the guidance of Christians’ life.
Christianity teaches the essential belief of Trinity. God is one God in three persons co-existing as one. They cannot be divided. They are the Father, the Son (Jesus Christ), and the Holy Spirit.
The 2.1 billion adherents of Christianity are divided into several denominations. The three primary divisions are Roman Catholicism, Eastern Orthodoxy, and Protestantism.
There are some major differences between the three denominations. Thus, even though they share the same general concept of God, the three remain separated and some of them claim as different religions.