The concept of national interest shapes foreign policy by influencing decisions that prioritize the economic, security, and ideological goals of a country. It often serves as a framework guiding diplomatic relations, military actions, and international agreements. Policymakers typically assess how actions align with the nation's values and objectives, balancing realism with ethical considerations. Understanding national interest aids in navigating complex global issues, ensuring that foreign policy remains focused on long-term benefits for a nation and its citizens while addressing global challenges.