As chairman of the Milken Institute’s Center for the Future of Aging, Paul Irving is a leading campaigner in what has become known as the purposeful aging movement. Author of The Upside of Aging: How Long Life Is Changing the World of Health, Work, Innovation, Policy and Purpose, Irving says longevity is creating an entirely new definition of what it is like to be old. From going back to school in your sixties to romances springing up late in life, Irving views aging with relish and optimism. In this in-depth interview with journalist and broadcaster, Peter Bowes, Irving explains why he considers aging, along with climate change, to be the “great challenge of the 21st century”. He also discusses the Institute’s upcoming global conference, ‘Building Meaningful Lives,’ which took place in Los Angeles from April 30-May 3, 2017.