How did nationalism create instability in the years before World War I?

The overall cause of World War was the assassination of Archduke Franz Ferdinand. Nationalism was a great cause of World War one because of countries being greedy and not negotiating. ... Even if they weren't able to win a war due to their strength and understanding of plans and leaders. This leads to Imperialism.

answer; /// slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final

i thinl it is the 1st answer