One of the greatest challenges for art and culture, sounded by intellectuals and also by funding bodies, is to represent diversity. But what precisely does this term mean and why does it so often placate rather than produce what it names? Professor Steven Vertovec, Director of the Max-Planck-Institute for the Study of Religious and Ethnic Diversity (G ttingen, Germany) puts forward the notion of "super-diversity," noting "the need to re-evaluate...