I recently met neopelagian christi-anarchist community developer Dave Andrews. We had some good discussion, and later he gave a presentation on his centered-set approach to community.
In the mid 70s Paul Hiebert popularized the concepts of bounded-set and centered-set definitions of social groups. Roughly, the bounded-set defines group membership by position relative to a boundary. The centered-set defines group membership by movement relative to a center. I think both forms of definition are helpful in describing Christian life and community, my objections are to a theology that defines people as other than ("original and total") sinners, and Christ as other than ("substitutively atoning") Savior.
Nevertheless, I look forward to benefiting from Dave's writing on community work [1 & 2].