What perspective says that war is related to the power relationships between countries?

The perspective that views war as related to the power relationships between countries is known as Realism in international relations theory. Realists argue that states act primarily in their own self-interest to ensure their survival and maintain or enhance their power. This perspective emphasizes the anarchic nature of the international system, where power dynamics and competition can lead to conflict and war. Realism highlights how shifting alliances, military capabilities, and national interests drive states toward conflict in their pursuit of dominance.