Nationalism influences political movements by fostering a strong sense of identity and belonging among a defined group, often leading to calls for self-determination and sovereignty. It can rally support for independence, cultural preservation, or political reform, uniting individuals under a common cause. While nationalism can strengthen a sense of community, it may also lead to xenophobia or exclusionary practices against those perceived as outsiders. This duality makes nationalism a potent but potentially divisive force in contemporary politics, as seen in various social movements and electoral landscapes across the globe.