The outbreak of the Covid-19 epidemic in the Year 2020 has caused unpredictable and new problems and challenges in the domain of world politics and international relations, and has forced the governments to take steps in direction of reviewing and rewriting their domestic and foreign policies; therefore with consideration to the outcomes of the states’ initiatives in this regard and on the strength of the viewpoints of the most scientists in the field of international relations, re-reading of nationalism has gained momentum, especially by the same governments. The question that arises is that “What consequences will the re-reading of nationalism raised from the post-corona World, have in the governments’ functions in international and domestic relations?” The governments have a nationalistic function and have found a desire toward authoritarianism in the domestic domain, in the post-corona world. The main objective of this work is to observe the formation and gravitation of the world governments toward nationalistic approaches in the post-corona world in a comprehensive and detailed way. The authors of this research, by using the descriptive-analytical method, concluded that the effects of nationalistic approaches of the governments in the post-Corona world can be evaluated by analyzing its domestic and international effects.