Just over 30 years ago, an Englishman named Christopher Alexander tried to revolutionize architecture. In A Pattern Language, Alexander told architects and planners to design homes on emotional and spiritual principles — not on traffic flow. The revolution didn’t quite come. But the book had a surprising influence on another group of experts: the computer scientists who were just beginning to shape the Internet. Produced by Lu Olkowski. (Originally aired: August 15, 2008)