This article from The Agile Elephant gives us a lot of clues as to the optimum size of our club. The research comes from the anthropologist Dunbar. When looking at human organisation he found certain scales of organisation reoccurring. Core group – up to 5 people (family) Close Group – c 15 people (close kinship group) Acquaintance Group – c 50 people (band of related close kin groups) Personal Social Group – c 150 people […]