How did Nationalism contribute to World War I?

Nationalism contributed to World War 1 because some nations wanted to assert their country's power and dominance over others.

European nations believed in their own cultural, economic, and military supremacy and each country believed that, in the case of war, their country would be victorious. Since the people believed that their nations and governments were right and that their military could win any conflict, little was done to reduce the chance of war. Instead, each country tried to prove their power and dominance.

cultural, economic and military supremacy.

cultural, economic and military supremacy.