How can nationalism lead to war?

nationalism is the idea of one believing their country is the best and above anyone else. looking at the french rev we see the revolutionary class starting wars with neighboring countries because of the development of nationalism. in extreme cases like WWII national extremists started issued because they believes they needed to take over other countries because they were just that good

Explanation:

not too sure on this one thinking tyo organize the division of africa

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate