Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
P.T. Barnum -- huckster, con man, promoter, entertainer and founder of "The Greatest Show on Earth".
Their intense faith and strict adherence to 300-year-old traditions have by turn captivated and repelled, awed and irritated, inspired and confused America.
The staggering death tolls of the Civil War permanently altered the character of the republic and the psyche of the American people.
Television game shows became an instant national phenomenon in 1955, but four years later contestant Charles van Doren admitted they were a scam.
With data compiled from tens of thousands of sex questionnaires, Alfred Kinsey changed America's views about sex with the Kinsey Reports.