George Lakoff is a professor in the Department of Linguistics at the University of California, Berkeley. He is the author of, among other books, "Women, Fire, and Dangerous Things" and "Moral Politics," both published by the University of Chicago Press. Mark Johnson is the Knight Professor of Liberal Arts and Sciences at the University of Oregon. He is the author of "The Body in the Mind" and "Moral Imagination," both published by the University of Chicago Press. Johnson and Lakoff have also coauthored "Philosophy in the Flesh: The Embodied Mind and its Challenge to Western Thought."