Zoroastrian motifs in non-Zoroastrian traditions
We owe to Zoroaster one of the oldest religions of mankind. We cannot call Zoroaster's doctrine a world religion in the strict sense, for it did not spread far beyond the limits of the Iranian world, nor did its followers spread over the world as the Parsis do now and the Manichaeans once did. But many ideas first expressed by Zoroaster or his followers, such as the all-encompassing dualism of good and evil, light and darkness, or the resurrection of the dead in the flesh, or the responsibility of mankind for the fate of this world and the world beyond, have influenced, from the middle of the first millennium BCE on, the spirituality of the near eastern peoples and so also the religions of Judaism, and by way of Judaism, Christianity and Islam, too. This is sufficient to grant the religion of Zoroaster a most important position in the history of human religiosity.