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Title: Language as a proxy for intimacy
Review: Professor Dunbar's thesis is that language evolved as a substitute for physical intimacy (grooming, not sex) as the basis for bonding a social group. As human communities grew too large for each member to personally groom each other member, we developed language as a means of "grooming" verbally, if not physically, a greater number of companions. The structure of language, including the words that we use, is designed for the purpose of advancing the social and sociological goals of the communities and individuals who use them. Very thoughtful and thought-provoking.
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