Explain at least one potential negative consequence of nationalism?

1) forced assimilation of minority cultures into a nation's majority culture.

(Here's a couple extra)

2) ethnic cleansing, such as Bosnia and Herzegovina in the 1990s.

3) rise of extreme nationalistic movements, such as Nazism.

4) competition between nations leading to warfare.

where is the passage?

can't without the passage.

post the full question.

the name of the theory is landmass theory.