Zoroastrianism is to some extent a monotheistic religion, in the sense that there is a supreme god, Ahura Mazda, that is central in all cult. Yet, the existence of lesser divine beings dilute this image.
Even the power that opposes Ahura Mazda, the evil Ahriman may be seen as a deity of Zoroastrianism, since he is an important force in cosmos.
To the “pantheon” of Zoroastrianism (note that in the “pantheon” no power can compare to Ahura Mazda), belong the jazatas. The jazatas are elements that are venerable, like the sun, the moon, Haoma, as well as Mithra and the Amesha Spentas.
The cosmology of Zoroastrianism is one of dividing time into three periods. In the first of these, the original one, everything was perfect. In the second, the present one, evil is active. In the third and last, perfect goodness will be restored. Human beings can with the help of Ahura Mazda reach the stage of total liberation from the worldly existence.
In such a situation life becomes healthy, filled with power and dominated by bliss. And more, the influence of the evil is extinguished.
When human beings reach such a stage the divine order has total influence on the world. But the teachings of Zarathustra was more than just spiritual.
He showed great interest in increased and bettered exploitation of the earth: forests should be opened, land cultivated and vermin exterminated.
The believers marry only within the extended family, but occasionally even with relatives as close as brother and sister.