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Description102111 Pinker 344.jpg
English: Photo by Rose Lincoln /Harvard Staff Photographer
Steven Pinker is the Johnstone Family Professor of Psychology and a Harvard College professor and he is the author of the new book, "The Better Angels of Our Nature: Why Violence has Declined."
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Steven Pinker is the Johnstone Family Professor of Psychology and a Harvard College professor and he is the author of the new book, "The Better Angels of Our Nature: Why Violence has Declined." Rose Lincoln /Harvard Staff Photographer