Realist Theory is a major perspective in international relations that emphasizes the competitive and conflictual nature of global politics. It posits that states are the primary actors in an anarchic international system, where they prioritize their own security and interests. Realists believe that power, often measured in military and economic terms, is the key to survival and influence. This theory also suggests that moral considerations are secondary to national interests. Prominent figures associated with Realist Theory include Hans Morgenthau and Kenneth Waltz, who argue that human nature drives states to seek power and that international relations are shaped by the struggle for dominance.