A summary of the history of Jazz

This is a little "funny" summary of what I think is the history of Jazz in African American Music:

First of all the jazz cames from the traditional and cultural music of African American people: Ragtime

The first age - "The stone age" of Jazz:   New Orleans jazz -  1920

The "Classic age" of Jazz:                               Swing                   -  1930

The "Renaissance" of Jazz:                             Be-Bop                -  1940

The "Pre-modern age" of Jazz:     Cool Jazz / Hard Bop   -   1950

The "Modern" Jazz:                   Fusion / Free Jazz      -   1960

The "Contemporary" Jazz:       Avant-Garde           -    1970 / 1990

The "New" Jazz:      "Electronic Jazz" / "Modern Jazz -  1990 / 2012