ABSTRACT
At the outset of the twentieth century 10 per cent of the population of the world lived in cities. In 2000 this proportion had risen to just over 50 per cent, and by 2025 the total urban population of the world is predicted to increase again in relative terms and to grow in absolute terms to a figure in excess of 5 billion worldwide.1 These urban concentrations invariably involve flows of culture that challenge the ethical settlement of the city, become a key driver of economic change, raise massive questions about the nature of city transformation, and become the fault lines of various kinds of social division.
