Chauvinism is extreme and unreasoning partisanship on behalf of a group to which one belongs, especially when the partisanship includes malice and hatred towards a rival group. The term is derived from Nicolas Chauvin, a soldier under Napoleon Bonaparte, due to his fanatical zeal for his Emperor. Nicolas Chauvin was injured, wounded 17 times in the Napoleonic Wars but nevertheless he continued to fight for France.
The origin and early usage indicate that it was coined to describe excessive nationalism or patriotism. An equivale ...
In "Imperialism, Nationalism, Chauvinism", The Review of Politics, p. 457, Hannah Arendt describes the concept:
Chauvinism is an almost natural product of the national concept insofar as it springs directly from the old idea of the "national mission." ... (A) nation's mission might be interpreted precisely as bringing its light to other, less fortunate peoples that, for whatever reason, have miraculously been left by history without a national mission. As long as this concept did not develop into the ideology of chauvinis ...