Jack Ryan is a fictional character created by author Tom Clancy. He is a former Marine and CIA analyst who often finds himself in the midst of international crises, using his intelligence and resourcefulness to navigate complex political landscapes. Ryan has appeared in numerous novels, films, and television adaptations, becoming a symbol of modern espionage fiction. Throughout his adventures, Jack Ryan showcases a blend of bravery and intellect, often facing formidable adversaries. His character has been portrayed by various actors, including Harrison Ford and John Krasinski, further solidifying his status as a cultural icon in the realm of action and thriller narratives.