Zoroastrianism //, also called Zarathustraism, Mazdaism and Magianism, is an ancient Iranian religion and a religious philosophy. It was once the state religion of the Achaemenid, Parthian, and Sasanian empires. Estimates of the current number of Zoroastrians worldwide vary between 145,000 and 2.6 million.
In the eastern part of ancient Persia more than a thousand years BCE, a religious philosopher called Zoroaster simplified the pantheon of early Iranian gods into two opposing forces: Ahura Mazda (Illuminating Wisdom) and Angra Mainyu (Destructive Spirit) which were in conflict.
Zoroaster's ideas led to a formal religion bearing his name by about the 6th century BCE and have influenced other later religions including Judaism, Gnosticism, Christianity and Islam.