What is consciousness? How do physical processes in the brain give ris e to the self-aware mind and to feelings as profoundly varied as love or hate, aesthetic pleasure or spiritual yearning? These questions tod ay are among the most hotly debated issues among scientists and philos ophers, and we have seen in recent years superb volumes by such eminen t figures as Francis Crick, Daniel C. Dennett, Gerald Edelman, and Rog er Penrose, all firing volleys in what has come to be called the consc iousness wars. Now, in The Conscious Mind, philosopher David J. Chalme rs offers a cogent analysis of...