Thirty-six years into the war on cancer, scientists have not only failed to come up with a cure, but most of the newer drugs suffer from the same problems as those available in the pre-war days: serious toxicity, limited effectiveness and eventual resistance. This is no surprise to University of California, Berkeley, genetics researcher Peter Duesberg, professor of molecular and cell biology. According to his novel yet controversial "chromosomal" theory of cancer, which is receiving increased attention among cancer researchers, each cancer is unique, and there is no magic bullet. "The mutation theory of cancer says that a limited number...