Zoroaster , c. 628 B.C.c. 551 B.C., religious teacher and prophet of ancient Persia, founder
of Zoroastrianism. Zoroaster, the name by which he is ordinarily known,
is derived from the Greek form of Zarathushtra (or Zarathustra) [camel
handler], his Persian name. Zoroaster is believed to have been born
in NW Persia. His youthful studies were crowned at the age of 30 by
the first of a series of revelations of a new religion. His attempts
to proselytize at home failed, and he fled east to ancient Chorasmia
(now largely Persian Khorasan), where he
converted King Vishtaspa (who may have been Hystaspes, the father of
Darius). The religion then spread rapidly
through Vishtaspa's domain. The circumstances of Zoroaster's death are
not known