Hinduism is polytheistic, meaning they worship many gods. Hinduism is a religion or way of life. It is the 3rd largest religion in the world. Hindus believe in reincarnation. Hinduism has flourished in India ever since and has also been a major influence on parts of Southeast Asia. Unlike other religions, Hinduism is not based on the beliefs of a single great religious leader. Hindus believe the world is united by a single spirit, know as Brahman.