Answer: Natioalism has an negative affect on the world because it separates us from being able to accept other’s cultures, as openly as possible. It peer pressures us to be like thoose in our nation.
Nationalism has a positive effect on the world because it helps us connect to the people around us. We all have the same environment and that links us together.
I did both perspectives just because I didn’t know if this is an assignment question or if you are just asking.
I Hope This Helps If Not Let Me Know