The aim of this article is to highlight the role of security throughout human history and to evaluate the relationship between this concept and international systems. Security represents a domain of huge interest which has been studied for a long time and it keeps to ask questions regarding to its dimensions. According to international relations theories and researches, nowadays security covers many spheres of activity which constitute important aspects of life. In this oder, the international community must be update to every challenge and problem which could be considered a threat to security