Unlike the religions in Civilization IV, this religion has no technological requirements to be unlocked and neither unique buildings nor a unique missionary unit. Like all other religions, Zoroastrianism can be founded directly after using a Great Prophet's Found Religion ability and only one civilization can be the founder of this religion.
Zoroastrianism is the preferred religion of the following civilizations:
Zoroastrianism, an ancient religion based on the teachings of the prophet Zoroaster, is believed to have been founded some 3,500 years ago in the region surrounding modern Iran. At one time one of the largest religions in the world, Zoroastrianism is only followed today by an estimated 200,000 adherents, living primarily in India, Pakistan, and Iran. Zoroastrianism is considered by some to be the oldest monotheistic religion in the world, although this is a point of contention among scholars. Zoroastrian beliefs are centered on the creator god Ahura Mazda, who is the focal point of all Zoroastrian tradition and worship. It is said that Ahura Mazda revealed his wisdom to Zoroaster, who then spread the teachings across the region. The sacred texts of Zoroastrianism, known collectively as the Avesta, contain hymns said to have been written by Zoroaster himself.
As with many religions, Zoroastrianism outlines the ways in which we can live in harmony with the surrounding world, in this case through good thoughts and good actions. Zoroastrians are often mischaracterized as fire worshippers, in part because of the prevalence of fire as a symbol in Zoroastrian rituals. In Zoroastrianism, fire represents the light of Ahura Mazda, and believers will always pray in the direction of the light, rather than worshipping the fire itself.