It is 40 years since a ‘back to school jam' in New York’s west Bronx kickstarted a movement and spawned a whole culture. BBC Culture’s Rebecca Laurence looks back on a party that changed the world.

 
On a hot August night in 1973, Clive Campbell, known as DJ Kool Herc, and his sister Cindy put on a ‘back to school jam’ in the recreation room of their apartment block at 1520 Sedgwick Avenue in the west Bronx. Entrance cost 25c for ‘ladies’ and 50c for ‘fellas’

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