(*)
The traditional date for this man's life was calculated as 258 years before Alexander the Great. His daughter married Jamasp, a minister of King Vishtaspa, whom this man had converted after curing his favorite horse. He authored a series of hymns called the gathas, which are now part of a holy book called the Avesta. He preached that Vohu Mana was one of the six Amesha Spentas and that the evil Angra Mainyu waged constant war on the good (*) Ahura Mazda. For 10 points, name this founder of a namesake dualistic Persian religion.
The traditional date for this man's life was calculated as 258 years before Alexander the Great.
{Zoroaster} [or {Zarathustra}]