The 1920s was the first time that more Americans lived in cities than on farms. The national wealth doubled between 1920 and 1929; a consumer society was being created. Mass culture was a product of the new generation, giving the public ready to wear clothes and newly available home appliances. The Great Migration was another event in the 1920s that included the migration of Blacks to Northern cities. This resulted in a rise in Black population in big cities and raising racial tensions. Radio and jazz music also became popular, and the 1920s became synonymous with the jazz age. It introduced new dances and new culture in the US, and jazz music was born out of Harlem. In this new society, the new woman was born and the Nineteenth Amendment was passed, allowing women to vote. Women began working white collar jobs and became invested in ideals that encouraged them to live for themselves, rather than aspire to become a wife and mother. This new women was called the flapper. Despite prohibition of the age, the new elements of culture in urban areas resulted in wild parties with illegal alcohol. The underground bars were known as speakeasies. Prohibition, the 21st Amendment, would eventually be removed from the constitution, but while it was in place it resulted in a rise in gang violence, and a rise of the Klu Klux Klan. The KKK was not only against Blacks, but anyone who wasn't a White traditionalist. The new culture of the urban areas clashed with the people still living in rural areas who believed in fundamental ideas. The Cultural Civil War was developing in the United States, the old-fashioned versus the modern people of the cities. The roaring twenties and growing economy(despite a small recession at the beginning of the decade), the 1920's would end with the economic bubble bursting and lead into the Great Depression of the 1930's.