Assistant Professor, Department of Theology and Islamic Sciences, Payam Noor University, Iran

The religions of ancient Iran encompass a wide range of religious developments, which in terms of phenomenological studies is a readable example of the evolution of the history of religions.In the history of religions, at the beginning of the religious life of every ethnic group, primitive religions ruled; So that the intention of all religious phenomena is focused on the meaning of primitive religions, namely naturalism, tribalism, eternal return to the beginning of history and patriotism,But suddenly prophets appear in some lands of the world and invite people to the center of monotheistic meaning.After this stage, the history of religions becomes the arena of conflict between primitive and monotheistic religions, and primitive religions resist and return to the monotheistic message in various forms.In the religions of ancient Iran, this process of religious transformation is also quite evident, so that first the primary beliefs of the Aryans are prevalent, and then Zoroaster emerges as a prophet and the call for monotheism. But immediately after his death, we are faced with the widespread return of early Zoroastrian religions.In the present article, we will examine this process of religious transformation in the religions of ancient Iran with the method of phenomenology of religion.