The purpose of this article is to study the threat perception process from a theoretical point of view. Using a philosophy-based, preparatory approach that provides the means for subsequent discussion, we will study the phenomenon of threat perception, prioritizing the data on the decision process formulated by political science and international relations. In this setting, threats can be perceived in different ways by the State bureaucracy because there are various factors influencing the process, including people's education, constitutional and legal systems, bureaucratic clashes and the quantity and quality of information. Consequently, the purpose of this article is to analyze the subject of threats from the classical perspective of national defense studies, but including in the debate contributions from economic and environmental studies related to the subject of international security, seeking conclusions about how much they favor the formation of defense policy and regional cooperation.