This article compares two philosophical traditions and their attitudes to war and violence within the context of international relations. The first refers to Hobbes’ political realism, the second to the Grotian idea of international community. Each of these traditions understands the role of violence and war at an international level differently. From the perspective of political realism, violence is part of anarchistic relations between states and a means for achieving their goals. From the perspective of international community, violence is a factor that needs to be minimized via the mechanisms of peaceful international cooperation between states. Based on the analysis of these two approaches, it is claimed that the Hobbesian perspective can be partly included in the perspective of the English School, which is based on the Grotian tradition.