The 1970s was a tumultuous time, full of upheaval on many fronts, from the end of the Vietnam War to the dawn of personal computers. It makes sense that its music had a similar helter-skelter feel.

Twenty years ago this week, 50 Cent dropped his debut album, Get Rich Or Die Tryin’. I want you to understand something about this. I am in no way, shape, or form exaggerating in even the teeny ...