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1920 was the beginning of a change in the 20th century. World War I had just ended which created an upsurge in nationalism and nativism. The quality of life was greatly increased in America.1920 marked a huge growth of cities, mass entertainment, and a revolution in morals. The first year of the roaring twenties had citizens disillusioned by the prosperity of the economy or the war and blinded to the conditions to come.