This week on Q&A, Whole Foods co-founder John Mackey and Harvard University psychology professor Steven Pinker discuss their books. John Mackey, author of "The Whole Story," talks about the rise of Whole Foods, the organic foods grocery store chain, and his political and intellectual development. Professor Steven Pinker talks about the role that rationality plays in a functioning society and the growth of irrationality in the United States. These interviews were recorded in Las Vegas at FreedomFest, an annual libertarian conference.
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