Paul McCartney wasn’t going to let the rest of his career be defined by his role in The Beatles. He was never ashamed of the work that he did with his bandmates by any means, but by the time the 1970s began, it was clear that they had done all they could do together, and they needed to start moving on to different things. And while there was always that Fab shadow looming over every one of their careers, Macca was going to take every shot he cou…