A political ideology where the nation is defined in terms of ethnicity. This means that the primary identity of individuals is linked to a shared ancestry, culture, language, and sometimes religion, which then forms the basis for national unity and political legitimacy. For example, the breakup of Yugoslavia involved various ethnic groups seeking self-determination and forming nation-states based on their perceived ethnic identity.
Understanding this concept is crucial for analyzing geopolitical conflicts, migration patterns, and the formation of states. It explains how cultural identity can be a powerful force in shaping political landscapes and influencing international relations. Historically, it has been a driving force behind both unification movements, such as the formation of Germany, and secessionist movements, leading to the creation of new countries.