Download How Many Friends Does One Person Need?: Dunbar's Number and by Robin Dunbar PDF

By Robin Dunbar

Why do males speak and girls gossip, and that's larger for you? Why is monogamy a drain at the mind? And why if you happen to be suspicious of somebody who has greater than one hundred fifty acquaintances on fb?

we're the fabricated from our evolutionary background, and this heritage colours our daily lives—from why we comic story to the intensity of our non secular ideals. In How Many acquaintances Does One individual Need? Robin Dunbar makes use of groundbreaking experiments that experience perpetually replaced the way in which evolutionary biologists clarify how the far-off previous underpins our present ­behavior.

we all know a lot more now than Darwin ever did, however the middle of contemporary evolutionary thought lies firmly in Darwin’s elegantly uncomplicated suggestion: organisms behave in ways in which improve the frequency with which genes are handed directly to destiny generations. this concept is on the middle of Dunbar’s ebook, which seeks to give an explanation for why people behave as they do. Stimulating, provocative, and immensely relaxing, his e-book invitations you to discover the variety of associates you've, no matter if you've got your father’s mind or your mother’s, no matter if morning ailment may truly be right for you, why Barack Obama’s 2008 victory used to be a foregone end, what Gaelic has to do with frankincense, and why we giggle. within the approach, Dunbar examines the function of faith in human evolution, the truth that such a lot folks have abruptly well-known ancestors, and why women and men by no means look capable of see eye to eye on colour.

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Extra resources for How Many Friends Does One Person Need?: Dunbar's Number and Other Evolutionary Quirks

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5 per cent) of all men. These extraordinary findings come from a study of the DNA of over two thousand men sampled from right across central Asia, from Japan to the Black Sea. While the Y chromosomes of most of the men in the sample showed the usual wide range of DNA types (known in the trade as haplotypes), nearly two hundred shared a set of very similar (sometimes identical) genetic signatures. This set of about eighteen haplotypes formed a very distinct cluster that set them apart from the other sixty or so haplotypes in the sample.

They do this by exploiting more subtle social strategies – forming coalitions with other males to undermine the power-based ranks of dominant males, exploiting female preferences, and so on. The second example comes from an analysis carried out by Dick Byrne of St Andrews University. He and his colleague, Andy Whiten, had put together an extensive catalogue of examples of tactical deception from the literature on primates. Tactical deception is the term used to refer to cases in which one animal exploits another to gain an objective.

It’s what has made them as successful as they have been and, by extension of course, it is what makes humans so successful – we have inherited the same social expertise. What marks primates (or at least monkeys and apes) out as different from all other species of animals is the sheer intensity of their social interactions. The difference between the rest of our pri31 How many friends does one person need? mate cousins and us is simply that we have taken this trend to a whole new level. Counting your friends in threes Noah, it is said, counted the animals into his Ark two by two.

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