Shortly after going from Marvel to Charlton Comics, Denny O’Neil kicked off his iconic time with DC Comics when he and a number of other Charlton freelancers were brought over.
O’Neil then teamed with artist Neal Adams (one of their many collaborations on Green Lantern/Green Arrow, a book that addressed numerous political and social issues as the eponymous heroes fought crime together.
O’Neil started off writing for books like Wonder Woman and Justice League of America, but he really made a splash when he started tackling Green Arrow, with the writer stripping Oliver Queen of his wealth and turning him into a socially-conscious, left-wing superhero.