This might be of interest to people here:
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What's meant by "community" varies from person to person, so looking for a consistent definition is impossible.  

To get to the sociological basics, here's what Ferdinand Tonnies had to say:  

FERDINAND TONNIES
On Gemeinschaft and Gesellschaft
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Reprinted from Community and Society: Gemeinschaft und Gesellschaft by Ferdinand Tonnies, translated and edited by Charles P. Loomis, pp. 223-231. Copyright 1957, The Michigan State University Press.
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The German sociologist Ferdinand Tonnies (1855-1936) was a major contributor to theory and field studies in sociology. [1] He is best remembered for his distinction between two basic types of social groups. [2] Tonnies argued that there are two basic forms of human will: the essential will, which is the underlying, organic, or instinctive driving force; and arbitrary will, which is deliberative, purposive, and future (goal) oriented. Groups that form around essential will, in which membership is self-fulfilling, Tonnies called Gemeinschaft (often translated as community). Groups in which membership was sustained by some instrumental goal or definite end he termed Gesellschaft (often translated as society). Gemeinschaft was exemplified by the family or neighborhood; Gesellschaft, by the city or the state. [3])  

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Some of us see BS as a very Gemeinschaft sort of place -- or, perhaps, it's better said that we try to make it one.  Some of us see it as a Gesellschaft sort of place and try to make it one.  

In my view, there are parts of BS (such as Life Stories) which are very Gemeinschaftlich in orientation and others (such as Future) which are very Gesellschaftlich.  

How we talk to each other varies, and should (just as how one talks to personal friends in a bar differs from how one talks to "professional friends" at work).  When we try to explore the question of "How we talk to each other here" we sometimes run into the trap of thinking there is only one way when, in fact, there are hundreds.  

Each of us, varying by personality, intent, and circumstance, look at "community" from a temporary, moving, and highly personal niche on the Gesellschaft --> Gemeinschaft continuum.