***** To join INSNA, visit http://www.insna.org ***** To my mind, Herb Gans' classic _The Urban Villagers_ (1962) is the classic about isolated densely-knit community not being able to form external linkages. Mark Granovetter makes this point in his famous "The Strength of Weak Ties" (which is about a lot more than Gladwell highlighted), and in the mid-1970s, he and Gans had a smart debate in the pre-blog American Journal of Sociology. Everything Old is New Again! Barry _____________________________________________________________________ Barry Wellman Professor of Sociology NetLab Director wellman at chass.utoronto.ca http://www.chass.utoronto.ca/~wellman Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto Canada M5S 2G8 fax:+1-416-978-7162 To network is to live; to live is to network _____________________________________________________________________ _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.