Us and Them: The Science of Identity (2008) is a book by author David Berreby, published by the University of Chicago Press. In this book David Berreby mixes neuroscience, social psychology, anthropology, and other fields to explore the “tribal mind” or group identity and how it affects every aspect of our lives. Revisions Originally published in 2005, the subtitle of the book was changed for the 2008 version to the present Science of Identity. The original subtitle was Understanding Your Tribal Mind. Awards Recipient of the Media Ecology Association's 2006 Erving Goffman Award for Outstanding Scholarship in the Ecology of Social Interaction.