The cosmic struggle of good and evil, Beliefs & Restrictions
Standing
Concerns Origin Period Start Year
Currently States -1500
Mary Boyce's A History of Zoroastrianism, Brill, 1989, dates the Gathas, the hymns the tradition ascribes to Zarathushtra himself, by the archaic state of their Avestan language, which stands close enough to Vedic Sanskrit that the two can be cross-dated by the same comparative linguistic methods used to date the Rigveda, pointing to roughly 1500 to 1000 BCE. Boyce sets that linguistic dating against a separate, later tradition, followed by classical Greek writers, that places Zarathushtra centuries afterward, a reckoning with no comparable linguistic evidence behind it. Because both the cosmic struggle of good and evil and the ethical triad of good thoughts, good words and good deeds are taught within the Gathas themselves, the origin period of both teachings is exactly as uncertain as Zarathushtra's own date, and it moves between the two proposals with it.
Source A History of Zoroastrianism, Mary Boyce