Ethnic nationalism is the form of nationalism in which the state derives political legitimacy from historical cultural or hereditary groupings (ethnicities); the underlying assumption is that ethnicities should be politically distinct. This was developed by Johann Gottfried von Herder, who introduced the concept of the Volk (German for Folk).
Ethnic nationalism is often simply referred to as "nationalism".
Fascism is usually marked by virulent ethnic nationalism, the most extreme example being Nazism in Nazi Germany.
The concepts homeland, fatherland, and motherland are notorious for having sometimes been used as an ethnic nationalist concept, sometimes with fascist or war-mongering connotations.
See also
nationalism for ethnic nationalism conflicts and ethnic nationalist organizations.
territorial dispute for a list of territorial disputes, many of which involve ethnic nationalism.
Civic nationalists are indiscriminate towards members of their nation with regard to their ethnicity, and thus prefer to define a nation more by its geographical borders and their struggle therefore is rather more focused on the preservation of culture as opposed to race or ethnicity.
Ethnicnationalists are often rather more authoritarian however and tend to define their identity not along cultural lines but along ethnic or racial lines.
Nationalists are not only concerned with the welfare of their own nations, although they do not wish to interfere at all in that of others, because they often believe that every nation has a right to self-determination.