The late 1980s have seen an explosion of interest in an unconventional, and sometimes bizarre, set of practices and beliefs commonly called the New Age movement. Led by such visible figures as Shirley MacLaine, thousands of Americans have turned to a wide range of self-help methods and philosophies geared toward spiritual fulfillment and, particularly, healing of the body, including acupuncture, channeling, and crystals. What all these methods seem...