Nationalism is a state of mind permeating the large majority of the people and claiming to permeate all its members; it recognises the nation-State as the ideal form of political organization and the nationality as the source of all creative cultural energy and economic well-being. The supreme loyalty of man is therefore due to his nationality, as his own life is supposedly rooted in and made possible by its welfare.

Hans Kohn, The Idea of Nationalism, Macmillan, 1961 (p.16). Also quoted in Andrew Vincent, Modern Political Ideologies, Wiley, 2009 (p.318).