Rock and roll began in the American south; a combination of the many styles of music that existed in the country at the time. Up until the late 1940s, different cultures in America had created their own styles of music, including blues, jazz, folk, country and swing. Around that time, musicians began to combine the different styles of music, and soon they came together to resemble what we now consider rock and roll. The earliest rock songs are mainly influenced by country and blues. With more and more families enjoying new prosperity after World War II, their teenage children had free time and money to spend. They began attending local dances and concerts where they heard this new style of music played, and soon began spending their money on records. Disc jockeys began to notice the popularity of the music and began playing it on their radio stations, pushing it into the mainstream. Many of the most popular rock and roll hits were blues songs that had been written by African-American songwriters, but were re-recorded by white artists. However, many African-Americans broke through into the mainstream, including legendary names like Chuck Berry, Fats Domino, Bo Diddley and Little Richard. The popularity of rock and roll was an important step toward integration, as people of all races came together to both make and enjoy the music