Nationalistic tendencies refer to the political, social, and cultural movements that promote the interests and culture of a particular nation, often emphasizing national identity and unity over international considerations. These tendencies have influenced various conflicts and movements throughout the 20th and 21st centuries, as groups seek self-determination and recognition of their distinct identities. They often arise in response to imperialism, colonialism, and globalization, leading to both unification efforts and tensions within multi-ethnic states.