Why did nationaalism spread across europe with napolean then repress for generations until the revolution of 1848?

The concept of Nationalism spread in Europe during Napoleon’s reign because of his conquests and the need to use it to make France a great power in Europe. Nationalism also helped unify the people of France. It retreated because the rulers of Europe were concerned that it would spark revolutions elsewhere

answer: economic globalization is the increasing economic integration and interdependence of national, regional and local economies across the world through an intensification of cross-border movement of goods, services, technologies and capital

what are local authorities doing to fix the problem

explanation: