If not, even an 80- to 90-year life needs rethinking. This post was written by Harry Margolis, a new contributor to the Squared Away Blog. In their book, The 100-Year Life: Living and Working in an Age of Longevity (published in 2016), the psychologist Lynda Gratton and economist Andrew J. Scott predict that living a century will soon become the norm and discuss the implications of a longer lifespan on work, retirement, family life, and society. Gratton and Scott tell us that with longer lifespans we need to abandon the concept of a three-stage life – youth and education, middle-age and working, and old-age and retirement. Instead, they say, we and our institutions need to become more flexible, allowing us to move in and out…