Realism is considered a very crucial theoretical approach which claims to represent the reality of international relations and it rejects the imaginative idealism. It created a place between war and peace; quarrels and moral standards; and national interests and national cooperation, it ultimately provides authenticity to the prior as compared to the latter respectively. Realist approach in International Relations emphasizes the constraints on politics imposed by human nature and the absence of the world government and together they make international relations largely an arena of power and interest. It also gives validity to selfish human nature, anarchic structure of the world, self-preservation, self-help, strategic military action, diplomatic conversations, balance of power/threat, cultural conflicts and after all violence. However, scholars who are working in this series have much to contribute to normative debates regarding international politics. But it is the need of hour to recognize the significant differences among realists. They offer conflicting results to many methodological political and ethical questions. It seems that realism is a flourishing research agenda in both international relations and political theory. This research article will theoretically and analytically examine the realism as an approach to international relations that has emerged gradually through the work-series of analysts in different continents in many ways of establishments that found logical as various traditions. In a conclusive way, it seems that realism is an inexhaustible and much timeless theory.