Globalization: you are forced into cutthroat wage competition against Guatemalan political prisoners. Oh, and enjoy your new gypsy, Jamaican, and Paki neighbors, who want to exterminate you, your family, and all your kind.
Nationalism: you know that your blood and the blood of your kin are connected to the land in which you live, the land of your ancestors, you know who you are, where you came from, and where you belong, because your blood connects you to your native soil
Compare the violent crime rates and general trends in wages over the past fifty years in:
London, UK
Detroit, Michigan, US
Tokyo, Japan
Seoul, Korea
Ankara, Turkey