Anthony D. Smith

According to Anthony D. Smith’s definition, nationalism in the 20th century is expressed thorugh the ideological movement, directed at social group’s autonomy, mobilization and individuality, whose members consider social group as an active or potential nation. In an extreme situations, nationalism emerges in the form of ethnic collisions, when one or more ethnic groups compete at the expense of one-another’s interests[1].
It is important to distinguish national movement, which intends to establish a nation-state, on the one hand, and nationslism – more radical doctrine, for which national interests are the top priority, on the other hand[2].
[1]LeBouthillier A.E. What is Nationalism? Introduction to Nationalism. http://www.davidduke.com
[2]Wikipedia http://www.wikipedia.org/