Zoroastrianism

One of the world's oldest monotheistic faiths, Zoroastrianism was founded by the prophet Zarathustra in ancient Persia. Its cosmic dualism between Ahura Mazda (truth/light) and Angra Mainyu (lie/darkness) profoundly shaped Judaism, Christianity, and Islam — contributing concepts of heaven and hell, angels and demons, final judgment, and the apocalyptic battle between good and evil.