Zoroastrianism, or more natively Mazdayasna, is one of the world's oldest religions, "combining a cosmogonic dualism and eschatological monotheism in a manner unique... among the major religions of the world." Ascribed to the teachings of the Iranian Prophet Zoroaster (or Zarathustra), he exalted their deity of wisdom, Ahura Mazda, (Wise Lord) as its Supreme Being. Leading characteristics, such as messianism, heaven and hell, and free will are said to have influenced other religious systems, including Second Temple Judaism, Gnosticism, Christianity, and Islam. With possible roots dating back...