How did the rise of nationalism influence the global community in the 20th
century?

Rise of the Nazi's

Explanation:

Nationalism influenced Adolf Hitler's rise to chancellor of Germany and he promised all of the German people economic reform and a chance to get back at the west. This was inspired by Mussolini's Fascist imitation of Rome. Japan also joined in, thinking themselves to be better racially superior to everyone, and they also wanted land and more natural resources. This sparked WW2, where all of the Axis powers committed atrocity after atrocity, and the wake of this brand of dangerous nationalism left millions dead.

Please note that no side was innocent in WW2, all sides committed atrocities.

Meet government officials and talk to them

Listen to official speeches and commentaries

Read newspapers and political literature

Attend public meetings on political issues

Listen to speeches from civic groups

Watch and read about presidential addresses to the nation and press conferences