12. HISTORY OF THE GENRE

Hip hop is a broad conglomerate of artistic forms that originated within a marginalized subculture in the South Bronx and Harlem in New York City among black and Latino youth during the 1970s. It is characterized by four distinct elements, all of which represent the different examples of the culture: rap music (oral), turntablism or "DJing" (aural), breaking (physical) and graffiti art (visual). Despite their contrasting methods of execution, they find unity in their common association to the poverty and violence underlying the historical context that birthed the culture. It was as a means of providing a reactionary outlet from such urban hardship that "hip hop" initially functioned, a form of self-expression that could reflect upon, proclaim an alternative to, try to challenge or merely evoke the mood of the circumstances of such an environment. Since its evolution throughout the South Bronx, hip hop culture has spread to both urban and suburban communities throughout the world. Hip hop is simultaneously a new and old phenomenon; the importance of sampling to the art form means that much of the culture has revolved around the idea of updating classic recordings, attitudes, and experiences for modern audiences—called "flipping" within the culture. It follows in the footsteps of earlier American musical genres such as blues, salsa, jazz, and rock and roll in having become one of the most practiced genres of music in existence worldwide, and also takes additional inspiration regularly from soul music, funk, and rhythm and blues.

different time frames in the genre :
1980s
New school hip hop
Golden age hip hop
Gangsta rap and West Coast hip hop1990s
East vs. West rivalry
2000s and 2010s

1980's
http://www.youtube.com/watch?v=9lDCYjb8RHk

New School HipHop
http://www.youtube.com/watch?v=WHRnvjCkTsw

Golden Age HipHop
https://www.youtube.com/watch?v=eXco_ity0fw

Gangsta rap and West coast HipHop
http://www.youtube.com/watch?v=TbSm6HsX_ek
AND 
http://www.youtube.com/watch?v=P690t9IzvjU

East vs. West Rivalry
http://www.youtube.com/watch?v=vJC2ax18oQM
vs
http://www.youtube.com/watch?v=tCVT7tqO-YA

2000s 
http://www.youtube.com/watch?v=WuAWTZ5jPxY
 2010s
http://www.youtube.com/watch?v=rEMsjeq43_U