This book traces the continuous history of the faith from the time it was preached by Zoroaster down to the present day - a span of about 3,500 years. First taught among nomads on the Asian steppes, Zoroastrianism became the state religion of the three great Iranian empires and had a remarkable influence on other world faiths: to the east on northern Buddhism, to the west on Judaism, Christianity and Islam. With the conquest of Iran by the Muslim...