How did the way the Persian government handled religion throughout the empire help preserve social and political order?

In the Persian Empire, since the period of Achaemenid dynasty there was an existing principle of religious tolerance, that was spread throughout the whole country.

Explanation:

Even during the reign of Cyrus the Great, who was the first important ruler of the Empire a religious tolerance was established. He was known in history as a ruler who freed Jews from Babylonian captivity, but also as someone who brought edict throughout the country in which a principle of tolerance dominated. This was continued during the period of his successors.