This book is really interesting and gives a fascinating insight into how networking and social 'grooming' (and I don't mean dressing presentably in public!) are not only essential but important for our personal safety and survival... look how easy it is to perpetrate crimes against, or renege on deals with, people to whom we have no loyalty ties: Dunbars' example is the taxman! Despite a tendency to reduce human existence to Machiavellian self-interest and propogation of the species, Dunbar makes some very pertinent points and shows how similar we are in many respects to our primate cousins. The true value of this book, however, lies in Dunbar's explanation for the evolution of language in our species. It is a fairly academic read and heavy going at times but well worth the effort. Highly recommended for all 'seekers' of knowledge about the human condition; though I would suggest the childless-by-choice, and/or those with a higher sense of purpose, among us temper any ensuing existential neurosis by reading it in conjunction with The Celestine Prophecy by James Redfield!