In his reform of the old Mazdian (see Mazdaism) religion, Zoroaster (see Zoroaster), in theory, did away with mythology (see Zoroastrianism). The early Aryan (see Aryans) idea of a pantheon of amoral immortals was discarded in favor of an essential duality that lay at the source of existence. There was division between evil spirits or daevas led by Angra Mainyu (see Angra Mainyu) and good spirits, or ahuras, led by the supreme god, Ahura Mazda (see Ahura Mazda). The choice for humanity and for individuals was between the two sides of the essential duality (see Zoroastrian Cosmogony, Zoroastrian Flood, Zoroastrian Afterlife, Zoroastrian Apocalypse, Zurvan, Amesa Spentas).
