It sounds like Peggy's comment switches from a genetic to a memetic analysis. >From that standpoint, at least on the Internet, it seems a variety of inclusivity in groups works. Of course, that is slightly different, as the evolutionary pressure is not to reproduce but to exist (have [active] members). I am involved with groups that are very open, and groups that are very clique-like; also ones that have a lot of 'noise' and ones that are very themed, and the first and second pairs are not necessarily always the same. -Arlo James Barnes
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