Analyzing the Believe to Divine Oneness (Unity) among Iranians Before Islam (Case Study: Religion of Zoroaster)

The main theme of the article is to analyze and describe believe to Divine Oneness (Unity)   among Iranians before Islam based on Islamic history and resources.

The method of the present study is library and analyzing the Islamic documents and references.

The findings of the research indicated that according to Islamic history Zoroastrian Iranians are categorized as followers of the book.

The author of the research concludes that Iranians have been the followers of unique god before the entrance of Islam to Iran. They have accepted the teachings of the prophet Zoroaster. His message is inviting people to accept the Unity and he is the prophet of the Devine revealed book which is remained among the followers excluding some missing parts and because of some deviations the believe to dualism spread  among Iranians.