Zoroastrianism is one of the world’s most ancient faiths. One of its leaders wrote to Bahá’u’lláh. His reply was an exploration of the oneness of religion and the needs of today. Although not well-known in the English speaking world, beyond the fact of its existence, it was once the faith of a great civilization that stretched from Central Asia to Greece. It comes from the same part of the world in which Bahá’u’lláh was born and there was in his day, and still today a Zoroastrian community in Iran. When visiting America, Abdu’l Baha would sometimes comment on the effects of Bahá’u’lláh’s teachings. Communities which had kept apart for hundreds of…