Zoroastrianism, ancient pre-Islamic religion of Iran that survives there in isolated areas and, more prosperously, in India, where the descendants of Zoroastrian Iranian (Persian) immigrants are known as Parsis, or Parsees. The Iranian prophet and religious reformer Zarathushtra (flourished before the 6th century bce)—more widely known outside Iran as Zoroaster (the Greek form of his … Continue reading Persian Zoroastrianism in modern day Iran