Religions have shaped much of world history and thought, from philosophy to law, from music to architecture, from wars to peace.
Much of the world’s religions can be traced back to two sources: Abrahamic religions or India. The Abrahamic religions includes Judaism, Christianity, Islam, Bahá’í Faith, Samaritanism, Druze and the Rastafari movement. Indian subcontinent was the source of major religions including Hinduism, Jainism Buddhism and Sikhism.
via Howard Steven Friedman: 5 Religions With The Most Followers.