Lastly, as you dance the nationalist polka, a small but momentous step may take you from believing that your nation is different from all other nations to believing that your nation is better. Nineteenth-century liberal nationalism required the Habsburg and tsarist empires to respect the unique experiences of Germans, Italians, Poles and Slovenes. Twentieth-century ultra-nationalism proceeded to wage wars of conquest and build concentration camps for people who danced to a different tune.
