What are the causes of nationalism in general?

Answer:
Nationalism was pretty much caused by a sense of unity, not independence. As a whole, those with the same backgrounds wished to unite and become their own, rather than being under a power that they didn't agree with or understand. This occured first in western Europe.
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First answer by ID0406845134. Last edit by Mrgd291190. Contributor trust: 32 [recommend contributor recommended]. Question popularity: 4 [recommend question].