Social Networks connect people to form new communities of interest. These communities are both virtual and real as they exist online and face-to-face. The potential is there for local governments to do the same and connect with their geographic counterparts to form regional governments and/or to govern regionally. Legal and political challenges would have to be addressed, but the possible cost savings to reduce replication of service and socio-economic needs that extend across local government jurisdictions make this argument worth having.
Inter-governmental agreements provide a glimpse into what is possible on a broader scale. Besides, jurisdictions formed when transportation, communication, infrastructure and protection were minimal or nonexistent have advanced light years from their historical beginnings.