Author Nelson George talks extensively about this in his book 'The Death Of Rhythm And Blues'. He documented how NY's Black radio station began to position themselves so they would appeal to a more affluent, older and to a large degree, whiter audience. He pointed out how young people found themselves being excluded especially when bubble gum and Europeanized versions of disco music began to hit the air waves. To many, this style of music lacked soul and to a large degree sounded too formulated and mechanical. In a recent interview hip hop pioneer Afrika Bambaataa spoke at length how NY began to lose its connection with funk music during this that time. He noted that established rock acts doing generic sounding disco tunes found a home on black radio. Acts like Rod Stewart and the Rolling Stones were cited as examples. Meanwhile Black artists like James Brown and George Clinton were for the most part unheard on the airwaves. Even the gospel-like soulful disco as defined by the 'Philly sound' found itself losing ground. While the stereotype depicted a lot of long haired suburban white kids yelling the infamous slogan 'disco sucks', there were large number of young inner city brothers and sisters who were in perfect agreement. With all this happening a void was created and hip hop filled it... Point blank, hip hop was a direct response to the watered down, Europeanized, disco music that permeated the airwaves.. FYI around the same time hip hop was birthed, House music was evolving among the brothers in Chicago, GoGo music was emerging among the brothers in Washington DC and Black folks in California were getting deep into the funk. If you ask me, it was all a repsonse to disco.