Paul Irving has no intention of ever retiring. As chairman of the Milken Institute’s Center for the Future of Aging, he is a leading campaigner in what has become known as the purposeful aging movement. A lawyer and former president of the Santa Monica-based Institute, Paul is an advocate for the elderly population, whom he sees as a talented and “dramatically underutilized” resource for society. Author of The Upside of Aging: How Long Life Is Changing the World of Health, Work, Innovation, Policy and Purpose, he 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, Paul views aging with relish and optimism. In this in-depth interview, he 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,’ taking place in Los Angeles from April 30-May 3, 2017.