Theorist Anthony D. Smith uses the term 'ethnic nationalism' for non-Western concepts of nationalism, as opposed to Western views of a nation defined by its geographical territory. The term "ethnonationalism" is generally used only in reference to nationalists who espouse an explicit ideology along these lines; "ethnic nationalism" is the more generic term, and used for nationalists who hold these beliefs in an informal, instinctive, or unsystematic way. The pejorative form of both is "ethnocentric nationalism" or "tribal nationalism," though "tribal nationalism" can have a non-pejorative meaning when discussing African, Native American, or other nationalisms that openly assert a tribal identity.