In modern politics, nationalism plays a crucial role by fostering a sense of identity and unity among citizens of a nation-state. It emphasizes pride in national culture, history, and sovereignty. While nationalism can inspire patriotic movements and social cohesion, it can also lead to exclusionary practices and conflict, particularly when combined with xenophobia or ethnocentrism. As globalization increases, tensions arise between nationalist sentiments and international cooperation, making nationalism a key factor in domestic policies and international relations.