Historical past is always an important part of individual and social identities. The present article studies numerous parades of Iranian identity in various historical periods by focusing on the method of Seyyed Javad Tabatabai. Accepting the importance of historical vision, he comments on the historical periods for understanding the history of ideas and the history as general. He divides the history of Iran into two ancient and modem ages, every ages; in turn, has subdivisions. Recognizing the importance of ethnic self-consciousness for the rising of national self-consciousness, Tabatabai believes that in every period, Iranians Identity has been shaped by the interaction of these two parameters. Then sometimes "Idea of Iran Land (Iran Shahr)" and sometimes rising of Iranian-descent dynasties such as Tahirids, Samanids and Buyida, were categories of Ethnic consciousness and sometimes, according to Tabatabai, Persian poets such as Firdowsi and Hafiz, were the carriers of "Ethnic consciousness" categories. With catastrophic excursions of Mongols, but, Iranian medieval began which led to the decadence of Persian literature and rationalism and the dominance of superficial religious knowledge and practices. In consequence, we witness the decadence and the retrogression of political thinking in Iran.