Zoroastrianism?

[Wyrd of Gawd]

Does anyone know much about this most ancient faith?

https://en.wikipedia.org/wiki/Zoroastrianism

They say it is one of the main inspirations for Islam, Judaism and (God's favorite !)Christianity!

As far as monotheisms go, it doesn't seem too bad. It says that all people, whether Z or not, must be on the side of good (or truth) against evil (or "the lie")

Their "Fall of man" story makes a little bit more sense. Instead of Adam and Eve being tricked by a serpant into going after an attractive nuisance (apple tree), in Zoroastrianism, it really was just Angra Maiyu (or the evil God, rather than Satan) trying to mess up Ahura Mazda (Good God's) creation.

While there is a Hell, it is ultimately a place of reform as opposed to eternal punishment.

Any knowledge of this most ancient sect?

You have to be born into it; no converts.  Almost all of the Christian beliefs mirror it.