Answer:
The French Revolution initiated the movement toward the modern nation-state and also played a key role in the birth of nationalism across Europe where radical intellectuals were influenced by Napoleon and the Napoleonic Code, an instrument for the political transformation of Europe.
Nationalism, therefore, seeks to preserve and foster a nation's traditional culture, and cultural revivals have been associated with nationalist movements. It also encourages pride in national achievements, and is closely linked to patriotism.
A region's nationalism is strongest if the optimal size of its domestic market equals the size of its country. All else being equal, increasing a region's foreign trade reduces its economic interests in its domestic market and thus weakens its nationalism