In this episode, which Dawkins described as “one of the best interviews I have ever had,” the eminent ethologist and host Jason Gots talk about whether pescatarianism makes any sense, where morality should come from (since, as Hume says, "you can't get an 'ought' from an 'is'), the greatness of Christopher Hitchens, and the evils of nationalism. About the guest: Today’s guest is internationally best-selling author, speaker, and passionate advocate for reason and science as against superstition Richard Dawkins. From 1995 to 2008 Richard Dawkins was the Charles Simonyi Professor of the Public Understanding of Science at Oxford University.  Among his many books are The Selfish Gene, the God Delusion, and his two-part autobiography: An Appetite for Wonder and A Brief Candle in the Dark. His latest is a collection of essays, stories, and speeches called Science in the Soul, spanning many decades and the major themes of Richard’s work. About Think Again: Since 2008, Big Think has been sharing big ideas from creative and curious minds. Since 2015, the Think Again podcast has been taking us out of our comfort zone, surprising our guests and Jason Gots, your host, with unexpected conversation starters from Big Think’s interview archives. Learn more about your ad choices. Visit podcastchoices.com/adchoices