Explain how nationalism can be harmful

Nationalism is a form of in-group/out-group thinking.

Committed to winning at all costs, with power-seeking and superiority as the only real goal, nationalists feel justified in hurting the people of other countries.

Nationalism also contributes to internal fragmentation and instability

A leader with a nationalist mandate will feel entitled to breaking the laws of his or her own country.

Answer they are produced by collision of tectonic plates;