What form of religion did Zoroastrianism represent in the Persian Empire?

Zoroastrianism is best understood as a form of monotheism because it centers around the worship of a single, all-powerful deity known as Ahura Mazda. This god is seen as the creator of the universe and embodies all that is good, in contrast to Angra Mainyu, the evil spirit. Zoroastrian teachings emphasize a dualistic worldview, where the ongoing struggle between good and evil plays a critical role; however, the core belief is in the supremacy of Ahura Mazda.

The monotheistic nature of Zoroastrianism distinguishes it from polytheism, which involves the worship of many gods, and atheism, which denies the existence of any deities. While henotheism allows for the worship of one particular god without denying the existence of others, Zoroastrianism's focus on a singular divine presence aligns it more closely with monotheism. Thus, when considering the religious framework of Zoroastrianism within the context of the Persian Empire, recognizing it as monotheistic is essential for understanding its influence and teachings.