Audio materials on this website were designed to capture "significant political and historical events and personalities of the 20th century."

Materials include 107 items, including speeches, addresses, and private telephone conversations from 19 speakers. Most material comes from three U.S. presidents—Richard M. Nixon (34 items); Lyndon Baines Johnson (30 items); and John F. Kennedy (19 items).

Additional material highlights international figures such as Secretary of State George Marshall; British Prime Minister Winston Churchill; civil rights leaders Martin Luther King, Jr., John Lewis, and A. Philip Randolph; Supreme Court Justices William O. Douglas, Arthur J. Goldberg, and Oliver Wendell Holmes, Jr.; and Soviet Union Premier Nikita S. Khrushchev. This website provides an opportunity to experience the persuasive speaking powers of 20th-century world leaders.