One of the most respected marketing gurus in the world shows why some of today's biggest brands are having trouble and how to avoid repeating their mistakes. It wasn't long ago that Levi-Strauss, Xerox, Crest, AT&T, Firestone, and Digital Equipment dominated their respective markets. What happened to undermine their standings and of those of other superbrands? Are their declines simply the inevitable consequence of change and the birth of new competition?...