Steven Pinker is Harvard College Professor and Johnstone Family Professor of Psychology at Harvard. His research is on visual cognition and the psychology of language. Among his books are “The Language Instinct,” “How the Mind Works” and “The Blank Slate.” He has been named Humanist of the Year, and is listed in Foreign Policy and Prospect magazine's "The World's Top 100 Public Intellectuals" and in Time magazine's "The 100 Most Influential People in the World Today." His latest book is “The Stuff of Thought: Language as a Window into Human Nature.”