Book excerpt: For the magazine's centenary celebration, an anthology of pieces from the early golden age of Vanity Fair. Features great writers on great topics, including F. Scott Fitzgerald on what a magazine should be, Clarence Darrow on equality, D.H. Lawrence on women, e.e. cummings on Calvin Coolidge, John Maynard Keynes on the collapse in money value, Thomas Mann on how films move the human heart, Alexander Woollcott on Harpo Marx, Carl Sandburg on Charlie Chaplin, Djuna Barnes on James Joyce, Douglas Fairbanks, Jr., on Joan Crawford, and Dorothy Parker on a host of topics ranging from why she hates actresses to why she hasn't married.