American culture and society underwent a period of great change between 1910 and 1929 due to the popularity of the cinema, silent films, talkies and the impact of jazz music.
Some referred to the 1920s as The Roaring Twenties. At the time, business was booming - many Americans were developing a taste for a new, faster lifestyle. Modern music became popular as a result of developments in the media (radio, records and films). People had more money to spend and more time to listen to the music of the time.
Jazz originated from the southern states of the USA, from the blues and ragtime music of the black people. Young people had had enough of their parents' old dances, eg the waltz.
Jazz was much more rhythmic and lively, and it was easy to dance to. This led to young people smoking, drinking and, according to some, behaving indecently. College students, especially, were willing to challenge their parents' values and lifestyle.
A number of black musicians became very famous, including Louis Armstrong and Bessie Smith, The Empress of the Blues. But racism was still a major problem during this period. When Bessie Smith had a serious car crash in 1937, she was taken to a hospital that was for white people only. The hospital refused to treat her because she was black and she died.
Listening to the radio was arguably the most popular form of entertainment. Mass production, the spread of electricity and buying on hire-purchase meant that approximately 50 million people, that's 40 per cent of the population, had a radio set by the end of the 1920s.
More daring dances became popular after World War One.