In international relations, the term "realism" refers to a theoretical perspective that emphasizes the role of the state, national interests, and power dynamics in global politics. Realists argue that states act primarily in their self-interest and that anarchy in the international system leads to competition among nations. This perspective often contrasts with idealism, which focuses on cooperation and moral principles. Realism underlines the importance of military strength and political power as key determinants of foreign policy and international interactions.