It's All About Rock!! Developed during and after the 1960s. It has its roots in 1940s and 1950s rock and roll and rockabilly, which themselves evolved from rhythm and blues, country music and other influences.

The Saga...

1950s-early 1960s
Rock and roll
Early British rock
Garage rock
Surf music

1963–1974
Folk rock
Psychedelic rock
Glam rock
Progressive rock

Mid to late 1970s
Hard rock and heavy metal
Arena rock
Punk rock
New Wave
Post-punk

1980s
New Wave of British Heavy Metal
Glam metal
The emergence of alternative rock

Early–mid 1990s
Grunge
Britpop
Indie rock

Mid-late 1990s
Pop punk
Post-grunge
New metal and rap rock

2000s
Garage rock revival
Post-punk revival
Metalcore and contemporary heavy metal