Short answers, pulled from the story.
Hip hop culture officially began on the 11th of August 1973 at a high-rise apartment located at 1520 Sedgwick Avenue in the South Bronx. DJ Kool Herc and his sister Cindy Campbell organized this indoor party to mark the start of the movement within the black community.
The four core pillars defining hip hop culture are DJing, MCing, breaking, and graffiti. DJ Grandmaster Flash pioneered scratching techniques around 1977 or 1978 while breakdancing developed as a dynamic style during percussion breaks at early parties.
Kurtis Blow released an album featuring The Breaks in 1980 which became the first certified gold rap song. This release marked a significant commercial milestone for the genre before The Beastie Boys topped the Billboard chart with Licensed to Ill in 1986.
By 1979 the genre had spread across the world with local rap scenes developing in countries like Sweden Finland and France. National Geographic recognized hip hop as the world's favorite youth culture where communities use it to address environmental justice and education.
Academics began studying hip hop linguistics at institutions like the University of Toronto to examine how words like diss and homie became prolific within cultural discourse. These studies analyze linguistic developments stemming from rejection of racial hierarchy holding White English as superior form of educated speech.