Zoroastrianism

Before Moses, before the great Abrahamic traditions took their familiar shape, one man stood on the ancient Iranian plateau and heard something that rearranged everything --- one source, one truth, one moral invitation extended to every soul capable of receiving it. His name was Zarathustra. Today Harmonia traces the extraordinary thread he set in motion across three thousand years of empire and conquest and stubborn survival, to a Parsi businessman from Bombay who crossed half the world in 1854 to make sure that thread did not break.