Can someone give me a summary of what this religion is about and the history of it? I have to do a projecct about religions for school, and chose this one. I know that Zoroastres(?) believe that the Earth is a battleground between good and evil, and that it will all end with good triumphant, but I need to go a bit deeper than that. And I have to translate it into Latvian, so Wikipedia is ruled out since it's too fucking complicated and in-depth. Goddamn fuckers... Anyway, thanks in advance.

Google, textbook, wikipedia.