In his latest book, Harvard psychology professor Steven Pinker looks at language and what it tells us about the way we think. Language, he argues, reflects the very nature of our brain structure. Pinker analyzes the flow of information into our brains and discusses the significance of how we name things, how we put sentences together, and the importance of swearing and politeness. Larry talks with Pinker about his latest look at human nature and its manifestation in language.