"Nationalism refers to a people's sense of common belonging and loyalty to a nation. Nationalism may arise among people who share such common traits as culture, language, origin, and tradition. It may develop as people join to form a unified government. Nationalism may also originate as people fight to establish a unique racial, cultural, or religious identity. A peoples' struggle to prevent their identity from being changed or erased by a more powerful group might also spur a feeling of nationalism. In each situation, nationalism creates a sense of connection and commitment to a group with a distinct set of beliefs, ideals, and traditions."
(Cerulo, K. A. (2016). Nationalism. In World Book student. Retrieved from http://www.worldbookonline.com/student/article?id=ar383740)