-Will 69 million baby boomers suddenly drop out of the workforce when they turn 65? It is difficult to imagine this generation, with its talent, education, and experience, idling away the last thirty years of life.---From the Foreword, by Robert N. Butler, M.D., The Mount Sinai Medical Center

Old age has been historically thought of as a period of frailty and dependence, yet studies show that with the help of advances in health and medicine, current populations will live longer and remain healthier than previous generations. As average life expectancies rise, traditional concepts of...