Nationalism significantly shapes global politics today by fostering cultural identity and unity within nations. It can drive policies that prioritize national interests over international cooperation, affecting diplomatic relations and trade agreements. Nationalistic sentiments may lead to protectionism, influencing foreign policy decisions and challenging global governance frameworks. Additionally, rising nationalism can conflict with multilateralism, causing tensions in international organizations. This complex interplay results in both cooperation and conflict, shaping the geopolitical landscape profoundly.