“…Requisite variety assumes that diversity within a system enhances the likelihood of system success in the face of external challenge. Research substantiating the requisite variety principle appears in the lit-erature on communication (Thompson, 1991), social relations (Sirgy, 1990), alcohol rehabilitation (Sterman, 1990), education (Foden & Mason, 1986), leadership (Fisher, 1985), and organizations (Follett, 1918(Follett, /1998Miller, 1990;Weick, 1987Weick, , 1991. Follett (1918Follett ( /1998) insists that the diversity of neighborhoods strengthens both the effectiveness of their orgamzations as well as democracy.…”