Comedy doesn't get the respect it deserves. Old school comedian Rodney Dangerfield built a career on disrespect. Vulture writer and host of Good One: A Podcast About Jokes, Jesse David Fox is on a mission to put that right. He says comedy is now a cultural force and an art form. More than entertainment, comedy connects people and influences politics. His new book traces the rise in the currency of laughter. It's called Comedy Book: How Comedy Conquered Culture-and the Magic That Makes It Work.