Jack Kirby, born Jacob Kurtzberg, was a legendary American comic book artist, writer, and editor, widely regarded as one of the medium's major innovators. Dubbed "The King of Comics," he co-created many of Marvel Comics' most iconic characters during the Silver Age, including the Fantastic Four, the X-Men, the Hulk, and Thor. His dynamic drawing style, characterized by "Kirby Krackle" and dramatic perspectives, revolutionized visual storytelling and influenced generations of artists. After his influential tenure at Marvel, he created the epic "Fourth World" saga for DC Comics, further cementing his legacy as a creative powerhouse.