Zoroaster other Zoroastrian elements are either not part of Zoroaster's own teachings or are used quite differently from how they are used in Zoroastrianism. Zoroaster appears in the Bahá'í Faith as a "Manifestation of God", one of a line of prophets who have progressively revealed the Word of God to a gradually maturing humanity. Zoroaster thus shares an exalted station with Abraham, Moses, Krishna, Jesus, Muhammad, the Báb, and the founder of the Bahá'í Faith, Bahá'u'lláh. Shoghi Effendi, the head of the Bahá'í Faith in the first half of the 20th century, saw Bahá'u'lláh as the fulfillment of a post-Sassanid Zoroastrian
Zoroaster 1500 and 500 BCE. Some scholars such as Mary Boyce (who dated Zoroaster to somewhere between 1700–1000 BCE) used linguistic and socio-cultural evidence to place Zoroaster between 1500 and 1000 BCE (or 1200 and 900 BCE). The basis of this theory is primarily proposed on linguistic similarities between the Old Avestan language of the Zoroastrian Gathas and the Sanskrit of the Rigveda (c. 1700–1100 BCE), a collection of early Vedic hymns. Both texts are considered to have a common archaic Indo-Iranian origin. The Gathas portray an ancient Stone-Bronze Age bipartite society of warrior-herdsmen and priests (compared to Bronze tripartite society;