"Only in the 1990s did physicists begin to explore real networks, both natural and artificial, as evolving systems with intriguingly complex and effective architectures. - Progress has been so immediate and astounding that we actually face a new science based on a new set of concepts, and, one may even say, on a new philosophy: the natural philosophy of a small world. - Old ideas from mathematics, statistical physics, biology, computer science, and so on take on quite new forms in applications to real evolving networks."--BOOK JACKET