Calvin "Cal" Fussman is an American journalist and author. He is a Writer at Large for Esquire magazine, known for the What I've Learned column, where he interviews leaders in various fields, which have included Mikhail Gorbachev, Jimmy Carter, Ted Kennedy, Jeff Bezos, Richard Branson, Jack Welch, Robert De Niro, Clint Eastwood, Al Pacino, George Clooney, Leonardo DiCaprio, Tom Hanks, Bruce Springsteen, Dr. Dre, Quincy Jones, Woody Allen, Barbara Walters, Pelé, Yao Ming, Serena Williams, John Wooden, and Muhammad Ali.