In 1960, when I came out of prison as an ex-convict, I had more freedom under parolee supervision than there's available... in America right now.
The great thing about using the past is that it gives you the most colossal freedom to invent. The research is necessary, of course, but no one writes a novel to dramatically illustrate what everybody already knows.
Hip-hop is when you have crowd participation; when you chant at the audience and they chant back at you; when you wave your hands in the air like you just don't care; or some breakdancing. Everything today is just low-beat, real bass-y, bass-y, good rap records.