Download or read book Us and Them written by David Berreby and published by University of Chicago Press. This book was released on 2008-11-24 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This groundbreaking and eloquently written book explains how and why people are wedded to the notion that they belong to differing human kinds--tribe-type categories like races, ethnic groups, nations, religions, casts, street gangs, sports fandom, and high school cliques.