The Formation of Modern American Mass Culture
The radio, the electric phonograph, and movies resulted in similar tastes and lifestyles across the country as well as spread degrading stereotypes about minority's.
The radio drew the nation together by bringing news, entertainment, and advertisements to more than 10 million households by 1929.
The phonograph was a record player. Is brought about the "Jazz Age" in the 1920s which was a huge part of the culture in that time period period.
The most important new instrument of mass entertainment was the movie. The modern film industry took on its form in the 1920s. It was originally based in New York but then moved to Hollywood. 3/4 of the population went to the movie theater every week. Along with the radio, movies played a major role in reinforcing racial stereotypes.