The document provides a timeline of key events and developments in jazz history from 1900 to 1970. It discusses the emergence of early jazz styles in New Orleans, the development of bebop in the 1940s led by figures like Charlie Parker and Dizzy Gillespie, and the rise of hard bop and modal jazz in the 1950s-1960s with musicians such as Miles Davis, John Coltrane, and Thelonious Monk. It also mentions the growth of jazz fusion starting in the late 1960s blending jazz with rock and funk.