Theories of international relations can be divided according to objective and non-objective matters in understanding international relations. Fundamental theories such as realism and liberalism consider affairs neutral in understanding international politics, independent of intangible values' role. They do not place intangibles such as religion, culture, and norms in understanding global affairs. In contrast, non-fundamental or constructive theories such as normative and critical see things as value-oriented in international relations and do not consider international realities as separate from intangible values and affairs. In contrast to the fundamental theories that focus only on beings and non-beings, these theories emphasize the do's and don'ts and reasons in international relations, which are not presumed but can be changed. Thirdly, some views ignore the role of religion in international relations, becoming more prominent with the Islamic Revolution. They seek to return to the lost turning point, called the "Inspiration of Religion." In this inspiration, in addition to the "Do's" and "Don'ts," the "Beings" and "Non-Beings" are emphasized. The present study aimed to examine the nature and the place of religion in theories of international relations. In this regard, religion's inspiration started with the Islamic Revolution and emphasized issues such as; religious identity, religious value, religious norm, religion, political system, human nature, and the human condition in the society optimism. The research method is descriptive-analytical, and its theoretical framework is trans-theoretical.
