War and violence means the willingness or planning of political leaders to be used as a tool to advance national or international goals. This phenomenon is usually associated with increased tensions in relations between countries and human rights violations. In fact, militancy can be seen as a crime against national and international security, because it not only hurts the interests of countries, but also threatens global peace and stability.This can be exacerbated when political leaders and their advisers are influenced by the theory of conspiracy to manage decision-making and policy-making, an example of which can be seen in the actions of Joseph Stalin in the former Soviet Union. The author believes that such a situation in contemporary times is also very valid, justifying the necessity and importance. Here we look at data analysis with an analytical descriptive look and the use of documentary and library methods.The question that comes to mind here is, how does the theory of the illusion of political conspiracy affect the military and belligerent decisions of political leaders? It seems: leaders who are more susceptible to conspiracy information are more likely to turn to bellicose actions. The delusion of conspiracy as a psychological defense mechanism can justify the aggressive actions of such leaders. So the purpose of this article is to examine the relationship between the illusion of conspiracy and the militancy of political leaders and to provide solutions to reduce the impact of this phenomenon on international decisions. By better understanding this relationship, steps can be taken to prevent unnecessary wars and strengthen World Peace.