The Longevity ImperativeA leading expert on longevity calls for a revolution in the way we think about health, ageing, and the future . . . The last century saw a revolution in life expectancy. Whether you are male or female, born in the global south or north, the chances are that you can expect to live much longer than previous generations. But instead of seeing this as a precious gift of extra life, we see it as a burden, with ageing populations dogged by infirmity,