The Post Office, Winifred Gallagher argues, has been not just a witness to, but a foundational influence on, much of the history of the USA, particularly for women and African-Americans who participated in the nation's formation via the Post Office in pivotal ways. How the Post Office Created America tells this story, tracing the role of a unique institution and its leaders. Taking in all the major events in American history, from the Declaration of Independence to the Civil War to the advent of the Internet, Gallagher tells a vitally important story.