Author Profile: David Berreby

David Berreby (http://www.davidberreby.com/) is the author of Us and Them: Understanding Your Tribal Mind, about the mind's inescapable habit of sorting people into classes, categories, types and tribes. It will be published in paperback next fall by the University of Chicago Press. He blogs on the subject at http://www.usthemblog.com/, and on the rest of life at the Huffington Post. His work has appeared in The New Yorker, Nature, The New York Times Magazine, Smithsonian and many other publications. He is working on a book about attention.