Slave Songs of the Georgia Sea Islands published by Lydia Parrish. After the Civil War Prison songs. Late 1800's Blues develops and is complete by 1910. 1890's Ragtime develops and is the most popular music in America between 1900 and 1911. Early 1900's Marching band music, Ragtime and the Blues begin to be fused into early Jazz roots.
Jazz is born in New Orleans via a combination of black and creole music.
1920's New Orleans Jazz is the thing. The Jazz Age is born. 1930's Swing is king and this is the only time that Jazz and popular are the same thing. 1940's Bebop is born. It is later called simply Bop.