Download Thinking Big: How the Evolution of Social Life Shaped the by Robin Dunbar, Clive Gamble, John Gowlett PDF

By Robin Dunbar, Clive Gamble, John Gowlett

A nearer examine family tree, incorporating how organic, anthropological, and technical elements can effect human lives

we're at a pivotal second in figuring out our distant ancestry and its implications for the way we are living at the present time. The boundaries to what we will be able to find out about our far-off relations were falling because of medical increase, equivalent to deciphering the genomes of people and Neanderthals, and bringing jointly diverse views to respond to universal questions. those collaborations have introduced new wisdom and prompt clean thoughts to check. the implications have shaken the outdated certainties.

the implications are profound; not only for the research of the prior yet for appreciating why we behavior our social lives in methods, and at scales, which are favourite to we all. yet such simple familiarity increases a hassle. whilst surrounded through the myriad technical and cultural concepts that help our international, urbanized life we will be able to lose sight of the small social worlds we really inhabit and that may be traced deep into our ancestry. So why can we want artwork, faith, track, kinship, myths, and all of the different points of our over-active imaginations if the truth of our powerful social worlds is decided through a restrict of a few 100 and fifty companions (Dunbar’s quantity) made up of family members, neighbors, and invaluable pals? How might this sort of social neighborhood bring about a urban the scale of London or a rustic as huge as China? will we quite hold our hominin prior into our human current? it's those small worlds, and the hyperlink they permit to the learn of the earlier that varieties the crucial aspect during this publication. forty black-and-white illustrations

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Thinking Big: How the Evolution of Social Life Shaped the Human Mind

A more in-depth examine family tree, incorporating how organic, anthropological, and technical elements can impact human lives we're at a pivotal second in knowing our distant ancestry and its implications for a way we are living this day. The boundaries to what we will find out about our far away family members were falling because of medical improve, akin to deciphering the genomes of people and Neanderthals, and bringing jointly various views to reply to universal questions.

Additional resources for Thinking Big: How the Evolution of Social Life Shaped the Human Mind

Sample text

A key aspect of the social brain hypothesis of particular interest to our story is the fact that it makes a very specific prediction about the size of human groups. The equation that relates social group size in apes to a species’ neocortex volume predicts that modern humans have a natural group size of about 150 individuals, the value that is, as we have seen, now known as Dunbar’s number. 1 spans the sequence from chimpanzees (representative of the last common ancestor between great apes and humans) to modern humans: all the now-extinct hominin ancestors must lie along the line between these two points.

Our aim in this book is to trace the evolutionary journey from our small beginnings to the present position. Our principal guides are psychologists and archaeologists, although many other disciplines have been involved. With our social perspective on human evolution, we have set out to learn about the following central issues: • Is there a limit in our brains, our cognitive ability, that restricts the size of the social groups we can live in? • If so, how did our cognitive ability evolve to cope with ever greater numbers of people, as societies grew from the small social worlds of hunters to today’s mega-cities?

It overlies what we might think of as the reptilian brain and it is what allows mammals to adjust their behaviour in more sophisticated ways to the exigencies of day-to-day circumstances. Although the complexity of behaviour and the psychology that underpins this is the key to the social brain story, the bottom line is that a species’ brain size seems to impose a constraint on the size of its social groups. When groups exceed their species-typical limit, they begin to fall apart because the animals cannot manage to maintain coherent relationships with each other.

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