Ice-T uses Hip-Hop to reflect the violence of Los Angeles and inspires a new form of Hip-Hop: Gangsta Rap. N.W.A’s first album, Straight Outta Compton, shocks America. After the LA Rebellion, Dr. Dre makes The Chronic, and creates Hip-Hop’s first hardcore pop record

Bronx-based DJs set Hip-Hop's sonic foundations. MCs, inspired by African American oral traditions, create the modern template for rap music, culminating with the emergence of Hip-Hop's first crew, Grandmaster Flash and the Furious Five.

Hip-Hop crews in the Bronx and Harlem begin to form around the DJs, but these pioneering groups never record any music. It would take R&B veterans to see the genre’s commercial potential and create Hip-Hop's first hit, "Rapper's Delight."

Run-DMC ushers in a new era of Hip-Hop. Russell Simmons and Rick Rubin build Hip-Hop's first empire, Def Jam. An unknown producer finds a new way to make beats and launches Hip-Hop's Golden Age, culminating in the epic fury of Public Enemy.

In the early 1990s, a new wave of hardcore East Coast artists emerges, led by Nas, Wu-Tang Clan and the Notorious B.I.G.

Rooted in New Orleans's rich music culture, No Limit mogul Master P and bounce breakouts DJ Jimi and Juvenile shake rap and put twerking on the map.

Innovators explode out of the South: Houston's DJ Screw slows hip-hop down, Memphis's Three 6 Mafia goes dark, and Atlanta's Lil Jon brings the crunk.

Mixtapes spread the hottest sounds, infringe copyright and break artists. Among them, 50 Cent polarizes, T.I. takes off with trap, and Lil Wayne clicks.

A hot, sticky music scene is born in Atlanta as the infectious hooks of TLC and Kris Kross yield to the gritty originality of OutKast and Goodie Mob.

2 Live Crew popularizes the Miami bass sound and scores a victory for free speech. The Geto Boys put Houston on the map, paving the way for UGK.