Denny O'Neil was an influential American comic book writer and editor, primarily known for his work with DC Comics and Marvel Comics. Born on May 3, 1939, and active in comics from the 1960s through the early 21st century, O'Neil is best remembered for his revitalizing take on several iconic characters. He is particularly acclaimed for his work on Batman, where he, along with artist Neal Adams, brought the character back to his darker roots in the 1970s after a period of campy storylines. O'Neil also made significant contributions to the character of Green Lantern when he teamed him up with Green Arrow in a socially conscious comic series that tackled many of the era's pressing issues like drug abuse, racism, and environmentalism. He frequently collaborated with Adams on this series, establishing a legacy of storytelling that combined superhero action with real-world relevance. Beyond his writing, O'Neil served as an editor at DC Comics, working on books like Batman, The Question, and the Batman titles during the Knightfall saga. In his later years, he also taught writing and worked in other areas of media. Denny O'Neil passed away on June 11, 2020, but left behind a legacy as a respected writer who impacted the comic book industry significantly with his thought-provoking and character-driven stories.