The cities and the regions of the world are being transformed under the combined impact of a restructuring of the capitalist system and a technological revolution. This is the thesis of this book, now in paperback. Castells not only brings together an impressive array of evidence to support it but puts forward a new body of theory to explain it. He analyzes the interaction between information technology, economic restructuring and socio--spatial change through the empirical observation of contemporary national, urban and regional processes in the capitalist world, with emphasis on the United States. The author summarizes a very wide range of evidence of urban and regional development, and isolates the causes and consequences of the processes and trends that may be observed.