Separatism is the advocacy for the separation of a certain group, often based on ethnicity, religion, or culture, from a larger political entity. This concept often arises in contexts where distinct groups seek greater autonomy or independence due to perceived oppression, cultural differences, or historical grievances. The dynamics of separatism can reflect broader themes of nationalism and identity in the 20th and 21st centuries, as well as the role it has played in mass atrocities since 1945.