Elon Musk

Walter Isaacson, University Professor of History at Tulane, has been CEO of the Aspen Institute, chairman of CNN, and editor of  Time  magazine. He is the author of  Leonardo da Vinci; The Innovators; Steve Jobs;   Einstein: His Life and Universe;   Benjamin Franklin: An American Life; and  Kissinger: A Biography, and the co-author of  The Wise Men: Six Friends and the World They Made. He and his wife live in New Orleans. Facebook: Walter Isaacson, Twitter: @WalterIsaacson