If, as W. E. B. Du Bois observed, the problem of the twentieth century was the problem of the color line, the problem of the twenty-first century may be one that reaches back to premodernity: religious identity. Even before 9/11 it was becoming evident that Muslims, not blacks, were perceived as the "other" most threatening to Western society, even in a relatively pluralist nation such as Britain. In Multcultural Politics, one of the most respected...