Needs of individuals and communities

Nope, which is probably why they are only theories. I would say that the needs of many individuals regarding communities are in fact for the individual (disguised personal gain). The individual in a community has needs and in some places the individual needs the support of the community for personal gain. The community likewise needs the support of the individual. You can be both - I'm all for personal gain but I also support community. It like you need both, unless you are completely self-sufficient (looks around - anyone? anyone?).