Hugh Pickens writes "Most ancestors from the distant past are, at best, names in the family records, leaving behind a few grainy photos, a death certificate or a record from Ellis Island. But J. Peder Zane writes that retirees today have the ability to leave a cradle-to-grave record of their lives so that 50, 100, even 500 years hence, people will be able to see how their forebears looked and moved, hear them speak, and learn about their aspirations and achievements. A growing number of gerontologists also recommend that persons in that ultimate stage should engage in the healthy and productive exercise of composing a Life Review. In response, a growing number of businesses and organizations have arisen to help people preserve and shape their legacy — a shift is helping to redefine the concept of history, as people suddenly have the tools and the desire to record the lives of almost everybody. The ancient problem that bedeviled historians — a lack of information about people's everyday lives — has been overcome. New devices and technologies are certain to further this immortality revolution as futurists are already imagining the day when people can have a virtual conversation with holograms of their ancestors that draw on digital legacies to reflect how the dead would have responded."