It was a decade of great heroes like Babe Ruth and Charles Lindbergh, and of passive leaders like Warren Harding and Calvin Coolidge. The exuberant freedom of flappers drinking bathtub gin and dancing the Charleston did little to counter such powers of oppression as the rapidly rising Ku Klux Klan. Only the fictional wealth of F. Scott Fitzgerald's Jay Gatsby survived the stock market crash unscathed; by the end of the decade, the comic adventures of Charlie Chaplin's -little tramp- bore faint resemblance to the grim realities faced by countless destitute Americans.

Too often, notes...