War was and remains one of the main instruments for the practice of international relations, and has always been a major focus of the study of international relations. War, such as diplomacy, propaganda, etc., is an instrument of national politics. States have used wars to achieve their goals and aspirations and achieve their national interests. War and peace issues are essential to understanding international relations. They are questions that involve the problem of survival.

Today the term "war" is used in many different ways. We talk about Cold War, Hot War, Limited War, Total War, Conventional War, Unconventional War, Civil War, Gang War, Preventive War etc. However, the war continued to exist, and took various forms.

In the modern period, war between developed countries took a certain form, characterized by a symbiotic relationship between well-organized countries, and practiced the industrializing of war in the way it was fought. However, by the end of the twentieth century, there was some evidence that the era of "modern" industrial war may have ended up with a new beginning. Since the end of the Cold War there has been a wide debate among war scientists about the transformation of war, as many specialists have argued that we need to deal with many of the wars that we see today differently and see them through a new perspective where globalization is included in order to understand it and deepen our knowledge of it.

After studying the many wars and armed conflicts that have erupted since the 1990s, some analysts have rushed to suggest that these wars and conflicts have become a new form of war and that such wars will be a feature of the post-Cold War and post-modern world, and that an era of the industrial superpowers war has been overlooked.