Jim Starlin is an American comic book writer and artist, best known for his work in the superhero genre. He gained prominence in the 1970s for creating iconic characters and storylines, particularly in the Marvel Comics universe. His most notable contributions include the creation of Thanos, a powerful villain who plays a central role in the Infinity Gauntlet storyline. Starlin's work often explores themes of cosmic adventure and philosophical questions, making his stories both entertaining and thought-provoking. In addition to his work with Marvel, he has also contributed to DC Comics and other independent publishers, showcasing his versatility and creativity in the comic book industry.