Thanks to increases in life expectancy, we can now expect to live for a long time. Most of us would welcome an extra day in the week, so why do so many of us view the prospect of additional years with fear and skepticism? The reason is simple: society is not currently structured to support long lives. Rather than thinking in terms of the needs of a rising number of older people, we must instead support the young and middle-aged to prepare differently for the longer futures they can expect. This book outlines the innovations needed to make the most of these longer lives: substantial changes to our health system, economy, and financial sector, as well as in how we manage our careers, health, finances, and relationships. Instead of seeing longevity as a problem, economist Andrew J. Scott challenges us to view it as an opportunity.