Is nationalism a positive or a negative idea? Give examples

Nationalism is a negative idea. Nationalism lead to World War 1, World War 2 and imperialism. These events which resulted because of nationalism lead to millions of human deaths and destruction.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

the correct answer is d