“We are aged more by culture than by chromosomes,” Margaret Gullette writes in this passionate indictment of the American attitude to aging. Her book spells out the price we pay for living in a culture that’s obsessed with youth and that sees aging as a demeaning process of decline. Gullette focuses most on middle-ageism, noting that we’re encouraged to think of ourselves as old at younger and younger ages. Many Americans buy into such ideas and are barely into midlife when they begin to complain about memory lapses and senior moments. Middle-ageism has eroded workplace seniority systems that reward experience and has cost many people age 40 to 60 their jobs as they were pushed aside to make way for younger employees. Gullette is a resident scholar in the Women’s Studies Research Center at Brandeis University.