IRANIAN RELIGIONS. Because of the scarce and fragmented data in our possession, we do not know the religions of ancient Iran, other than Zoroastrianism, as organic systems endowed with a specific pantheon, a mythology, particular creeds, cosmogonic and cosmological ideas, and precise eschatological notions. We can postulate the existence of other religions only through a careful analysis of those elements contained within Zoroastrianism that can be linked to a pre-Zoroastrian paganism and through an Indo-Iranian comparison. That is to say, we have no sources, other than the Zoroastrian, for any Iranian religion. Some scholars have viewed as testimony of a non-Zoroastrian cult those few religious references found in the royal Achaemenid inscriptions (sixth to fourth century BCE), as well as Herodotus's mention of "the Persian religion" (1.131–132), although, as is well known, Herodotus never refers to Zarathushtra (Zoroaster). Given these meager materials, we cannot be sure that...