"There is no evidence for thinking that the Zoroastrian message was meant for the Iranians alone. On the-contrary, history suggests that the exact opposite is likely, and there are also indisputable facts … which show clearly that Zoroaster’s teaching was addressed, earlier on at least to all men ... whether they were Iranians or not, Proto-Indoaryans or otherwise…"
January 1, 1970
https://en.wikiquote.org/wiki/Gherardo_Gnoli