George Bancroft (1800-1891) was an American historian, politician, and educator, best known for his work in writing a comprehensive history of the United States. His most notable work, "History of the United States," spanned six volumes and was published between 1834 and 1874. Bancroft's writings emphasized the importance of democracy and the role of the American Revolution in shaping the nation. In addition to his historical contributions, Bancroft served as the Secretary of the Navy under President James K. Polk and was a key figure in the establishment of the Smithsonian Institution. His efforts in education included founding the Massachusetts Historical Society, which aimed to preserve and promote American history.