John M. O'Sullivan

John M. O'Sullivan was a 19th-century Irish-American journalist and editor known for coining the term "Manifest Destiny," which described the belief that the United States was destined to expand across North America. He emphasized that this expansion was a divine right and mission. O'Sullivan's ideas influenced American views on westward growth and justified the country's territorial ambitions during the 1800s. His work combined journalism and political thought, shaping the national narrative about expansionism and manifest destiny during that era.