Wars and armed conflicts have accompanied mankind from the beginning of history and belong to the category of social phenomena. They became a permanent part of the historical process and are changing with it. Throughout history, wars have changed, as have views on the phenomenon of war, on war theories and strategic concepts. These views were and are a derivative of the progress of civilization. Since the turn of the 20th and 21st centuries, societies and nations have been the cause and target of wars to the larger extent than countries. Territory and power are no longer the primary causes and goals of armed conflicts. The analysis of these changes allows us to call these phenomena “new wars”. The article presents the issues of changes and transformations of wars and armed conflicts. It was stated that defining war as a political act was no longer sufficient. It was also established that in a changing world, new forms of war existed and would continue to emerge. The classic war, however, is not yet gone.