How did the concept of nationalism affect the revolution that occured throughout europe in the 1830s

In 19th Century, Nationalism played very significant part in the progress of Europe. Because of common national-identity, various small states were united and transformed into a Country, such as Germany and Italy. ... Progress and Development of the concept of modern nation state became easier by French Revolution.

Explanation:

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then its a law the end

i believe it to be a democracy