Gods

[Sigurd]

as far as i know, monotheism, the concept of a apocalyptic battle between good and evil with good eventually winning, the concept of an ultimate good and an ultimate evil struggling for eons over the souls of men, the concept of a constant struggle between civilization and barbarism all began with zoroaster.

You have the problem of dating Zarathushtra.
The notion of apocalyptic struggle between good and evil can be found in various old texts. The Memphite trilogy has it which seemingly is considerable older than Zoroastrianism.
One thing that I find interesting is that they were fire worshippers. Why? You may ask.
Well, I am thinking of my ancestors’ Norse mythology.
According to the sagas, Óðinn and his family came from the Caucasian area; they were fire worshippers and sacrificed to one God.
Speculations have it that Óðinn and his 12 blotgoder (priests)sacrificed to Thor, which I find difficulties with. It is also interesting that early Caucasian (as in the area of Caucasus: Armenia, Azerbaijan, et al) beliefs give Thor and Elijah(the Hebrew prophet) identical attributes with a wagon of fire and lightning ascending or flying over the havens pulled by something looking like goats.
Some likenesses between Norse mythology and Zoroastrianism are evident. One example would be the magical bridge all dead people have to cross to get to “heaven”. The valiant and good will be able to cross while the evil will fall down into an abyss. This bridge is found in both religions.
Another aspect is the equality of women, important in both religions. It is obvious from the sagas that Óðinn and his retinue were monotheistic. It was the kings of North Europe that worshipped him and his retinue as gods and mixed their old pagan religion with the one that Óðinn brought with him from Aasgaard in the east.
Oh, did I mention that Óðinn was a fire worshipper? I believe I did… He could as well as something else have been a Zoroastrian.