What is Zoroastrianism, and how dose its beliefs effect Religion?

an ancient religion founded by the Persian prophet Zoroaster the principal belief of which is in a supreme deity and in a cosmic contest between two spirits, one good and one evil.

i think it was the first monotheistic religion

God told me this was the answer: http://answers.yahoo.com/question/?qid=20060802120227AALZgDw&r=w

Zoroaster was whacked.

Zorastrianism was the first monotheistic religion

Since very few people have heard of this religion (Go, UhuraMazda, Go!) most people are unaware of any aspect of it.

For some, it may have no affect or effect at all.

The paradigm it set up mixed a bit with Hellenism and strongly influence Jewish thought, helping Judaism move from its polytheistic roots to something more or less monotheistic in the first few centuries B.C.E. Though a full-fledged Ahriman analog didn't come up until Christian times (no real Jewish equivalent to Satan as Christians view him--though there are some slightly borrowed minor deities like Beelzebub, who was, interestingly, a derivative of Baal, whom the Jews hated), the idea of one God fighting evil played well in Judaism.

Without the influence from Zoroastrianism, we wouldn't have Judaism as we know it, and we wouldn't have Christianity at all. Note how the Persian influence came about in Exilic and post-Exilic times.

Zoroastrism is a religion that existed in central and south Asia, it is also called praying to the fire, the holy book of it as "AVESTO", good spirit's name was Ahuramazda,i don't remember the name of the bad one Sr

You answered your own question. p~~~