Nationalism shapes political identity by fostering a sense of belonging and collective identity among individuals based on shared culture, language, or history. It encourages citizens to prioritize national interests and unity, often influencing political movements and policies. Nationalism can lead to increased patriotism but may also result in exclusionary practices against minorities or immigrants. In extreme cases, it can fuel conflicts and wars, as nations assert their superiority or territorial claims. Balancing nationalism with inclusivity is crucial for promoting peaceful coexistence in increasingly diverse societies, ensuring that all citizens feel valued and represented.