This article from Boston.com
“urban growth and prosperity have less to do with transportation links and industrial infrastructure than the patterns that govern behavior at a social mixer: Beautiful and charming cities draw a crowd, while the featureless and unattractive wilt like wallflowers” http://www.boston.com/bostonglobe/ideas/articles/2008/12/28/urban_playground/?page=full
Fascinating theory from urban thinker Richard Florida