Yet
millions
of people believe them.
Richard-Dawkins-The-Devil-s-Chaplain
A PRAYER FOR MY DAUGHTER
This last section, its title borrowed from W. B. Yeats, has a single item: an open letter to my daughter, written when she was ten. For most of her childhood, I unhappily saw her only for short periods at a time, and it was not easy to talk about the important things of life. I had always been scrupulously careful to avoid the smallest suggestion of infant indoctrination, which I think is ultimately responsible for much of the evil in the world. Others, less close to her, showed no such scruples, which upset me, as I very much wanted her, as I want all children, to make up her own mind freely when she became old enough to do so. I would encourage her to think, without telling her what to think. When she reached the age of ten, I thought about writing her a long letter. But to send it out of the blue seemed oddly formal and forbidding.
Then an opportunity fortuitously arose. My literary agent John Brockman, with his wife and partner Katinka Matson, conceived the idea of editing a book of essays as a rite-of-passage gift for their son Max. They invited clients and friends to contribute essays of advice or inspiration for a young person starting life. The invitation spurred me into writing, as an open letter, the advice to my daughter which I had previously been shy to give. The book itself, How Things Are, changed its mission halfway through its compilation. It remained dedicated to Max, but the subtitle became A Science Tool-kit for the Mind and later contributors were not asked to write specifically for a young person.
Eight years down the road, the legal onset of Juliet's adulthood happened to fall during the preparation of this collection, and the book is dedicated to her as an eighteenth birthday present, with a father's love.
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? Dear Juliet
Good and Bad Reasons for Believing144
Now that you are ten, I want to write to you about something that is important to me. Have you ever wondered how we know the things that we know? How do we know, for instance, that the stars, which look like tiny pinpricks in the sky, are really huge balls of fire like the Sun and very far away? And how do we know that the Earth is a smaller ball whirling round one of those stars, the Sun?
The answer to these questions is 'evidence'. Sometimes evidence means actually seeing (or hearing, feeling, smelling . . . ) that something is true. Astronauts have travelled far enough from the Earth to see with their own eyes that it is round. Sometimes our eyes need help. The 'evening star' looks like a bright twinkle in the sky but with a telescope you can see that it is a beautiful ball - the planet we call Venus. Something that you learn by direct seeing (or hearing or feeling . . . ) is called an observation.
Often evidence isn't just observation on its own, but observation always lies at the back of it. If there's been a murder, often nobody (except the murderer and the dead person! ) actually observed it. But detectives can gather together lots of other observations which may all point towards a particular suspect. If a person's fingerprints match those found on a dagger, this is evidence that he touched it. It doesn't prove that he did the murder, but it can help when it's joined up with lots of other evidence. Sometimes a detective can think about a whole lot of observations and suddenly realize that they all fall into place and make sense if so-and-so did the murder.
Scientists - the specialists in discovering what is true about the world and the universe - often work like detectives. They make a guess (called a hypothesis) about what might be true. They then say to themselves: if that were really true, we ought to see so-and-so. This is called a prediction. For example, if the world is really round, we can predict that a traveller, going on and on in the same direction, should eventually find himself back where he started. When a doctor says that you have
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measles he doesn't take one look at you and see measles. His first look gives him a hypothesis that you may have measles. Then he says to himself: if she really has measles, I ought to see . . . Then he runs through his list of predictions and tests them with his eyes (have you got spots? ), his hands (is your forehead hot? ), and his ears (does your chest wheeze in a measly way? ). Only then does he make his decision and say, 'I diagnose that the child has measles. ' Sometimes doctors need to do other tests like blood tests or X-rays, which help their eyes, hands and ears to make observations.
The way scientists use evidence to learn about the world is much cleverer and more complicated than I can say in a short letter. But now I want to move on from evidence, which is a good reason for believing something, and warn you against three bad reasons for believing anything. They are called 'tradition', 'authority' and 'revelation'.
First, tradition. A few months ago, I went on television to have a discussion with about 50 children. These children were invited because they'd been brought up in lots of different religions. Some had been brought up as Christians, others as Jews, Muslims, Hindus or Sikhs. The man with the microphone went from child to child, asking them what they believed. What they said shows up exactly what I mean by 'tradition'. Their beliefs turned out to have no connection with evidence. They just trotted out the beliefs of their parents and grandparents, which, in turn, were not based upon evidence either. They said things like, 'We Hindus believe so and so. ' 'We Muslims believe such and such. ' 'We Christians believe something else. '
Of course, since they all believed different things, they couldn't all be right. The man with the microphone seemed to think this quite proper, and he didn't even try to get them to argue out their differences with each other. But that isn't the point I want to make. I simply want to ask where their beliefs came from. They came from tradition. Tradition means beliefs handed down from grandparent to parent to child, and so on. Or from books handed down through the centuries. Traditional beliefs often start from almost nothing; perhaps somebody just makes them up originally, like the stories about Thor and Zeus. But after they've been handed down over some centuries, the mere fact that they are so old makes them seem special. People believe things simply because people have believed the same thing over centuries. That's tradition.
The trouble with tradition is that, no matter how long ago a story was made up, it is still exactly as true or untrue as the original story was. If you make up a story that isn't true, handing it down over any number of centuries doesn't make it any truer!
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Most people in England have been baptized into the Church of England, but this is only one of many branches of the Christian religion. There are other branches such as the Russian Orthodox, the Roman Catholic and the Methodist churches. They all believe different things. The Jewish religion and the Muslim religion are a bit more different still; and there are different kinds of Jews and of Muslims. People who believe even slightly different things from each other often go to war over their disagreements. So you might think that they must have some pretty good reasons - evidence - for believing what they believe. But actually their different beliefs are entirely due to different traditions.
Let's talk about one particular tradition. Roman Catholics believe that Mary, the mother of Jesus, was so special that she didn't die but was lifted bodily into Heaven. Other Christian traditions disagree, saying that Mary did die like anybody else. These other religions don't talk about her much and, unlike Roman Catholics, they don't call her the 'Queen of Heaven'. The tradition that Mary's body was lifted into Heaven is not a very old one. The Bible says nothing about how or when she died; in fact the poor woman is scarcely mentioned in the Bible at all. The belief that her body was lifted into Heaven wasn't invented until about six centuries after Jesus's time. At first it was just made up, in the same way as any story like Snow White was made up. But, over the centuries, it grew into a tradition and people started to take it seriously simply because the story had been handed down over so many generations. The older the tradition became, the more people took it seriously. It finally was written down as an official Roman Catholic belief only very recently, in 1950. But the story was no more true in 1950 than it was when it was first invented 600 years after Mary's death.
I'll come back to tradition at the end of my letter, and look at it in another way. But first I must deal with the two other bad reasons for believing in anything: authority and revelation.
Authority, as a reason for believing something, means believing it because you are told to believe it by somebody important. In the Roman Catholic Church, the Pope is the most important person, and people believe he must be right just because he is the Pope. In one branch of the Muslim religion, the important people are old men with beards called Ayatollahs. Lots of young Muslims are prepared to commit murder, purely because the Ayatollahs in a faraway country tell them to. *
? The fatwah against Salman Rushdie was prominently in the news at the time.
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When I say that it was only in 1950 that Roman Catholics were finally told that they had to believe that Mary's body shot off to Heaven, what I mean is that in 1950 the Pope told people that they had to believe it. That was it. The Pope said it was true, so it had to be true! Now, probably some of the things that Pope said in his life were true and some were not true. There is no good reason why, just because he was the Pope, you should believe everything he said, any more than you believe everything that lots of other people say. The present Pope has ordered his followers not to limit the number of babies they have. If people follow his authority as slavishly as he would wish, the results could be terrible famines, diseases and wars, caused by overcrowding.
Of course, even in science, sometimes we haven't seen the evidence ourselves and we have to take somebody else's word for it. I haven't, with my own eyes, seen the evidence that light travels at a speed of 186,000 miles per second. Instead, I believe books that tell me the speed of light. This looks like 'authority'. But actually it is much better than authority because the people who wrote the books have seen the evidence and anyone is free to look carefully at the evidence whenever they want. That is very comforting. But not even the priests claim that there is any evidence for their story about Mary's body zooming off to Heaven.
The third kind of bad reason for believing anything is called 'revelation'. If you had asked the Pope in 1950 how he knew that Mary's body disappeared into Heaven, he would probably have said that it had been 'revealed' to him. He shut himself in his room and prayed for guidance. He thought and thought, all by himself, and he became more and more sure inside himself. When religious people just have a feeling inside themselves that something must be true, even though there is no evidence that it is true, they call their feeling 'revelation'. It isn't only popes who claim to have revelations. Lots of religious people do. It is one of their main reasons for believing the things that they do believe. But is it a good reason?
Suppose I told you that your dog was dead. You'd be very upset, and you'd probably say, 'Are you sure? How do you know? How did it happen? ' Now suppose I answered: 'I don't actually know that Pepe is dead. I have no evidence. I just have this funny feeling deep inside me that he is dead. ' You'd be pretty cross with me for scaring you, because you'd know that an inside 'feeling' on its own is not a good reason for believing that a whippet is dead. You need evidence. We all have inside feelings from time to time, and sometimes they turn out to be right and sometimes they don't. Anyway, different people have opposite feelings,
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so how are we to decide whose feeling is right? The only way to be sure that a dog is dead is to see him dead, or hear that his heart has stopped; or be told by somebody who has seen or heard some real evidence that he is dead.
People sometimes say that you must believe in feelings deep inside, otherwise you'd never be confident of things like 'My wife loves me'. But this is a bad argument. There can be plenty of evidence that some- body loves you. All through the day when you are with somebody who loves you, you see and hear lots of little titbits of evidence, and they all add up. It isn't a purely inside feeling, like the feeling that priests call revelation. There are outside things to back up the inside feeling: looks in the eye, tender notes in the voice, little favours and kindnesses; this is all real evidence.
Sometimes people have a strong inside feeling that somebody loves them when it is not based upon any evidence, and then they are likely to be completely wrong. There are people with a strong inside feeling that a famous film star loves them, when really the film star hasn't even met them. People like that are ill in their minds. Inside feelings must be backed up by evidence, otherwise you just can't trust them.
Inside feelings are valuable in science too, but only for giving you ideas that you later test by looking for evidence. A scientist can have a 'hunch' about an idea that just 'feels' right. In itself, this is not a good reason for believing something. But it can be a good reason for spend- ing some time doing a particular experiment, or looking in a particular way for evidence. Scientists use inside feelings all the time to get ideas. But they are not worth anything until they are supported by evidence.
I promised that I'd come back to tradition, and look at it in another way. I want to try to explain why tradition is so important to us. All animals are built (by the process called evolution) to survive in the normal place in which their kind live. Lions are built to be good at surviving on the plains of Africa. Crayfish are built to be good at surviving in fresh water, while lobsters are built to be good at surviving in the salt sea. People are animals too, and we are built to be good at surviving in a world full of . . . other people. Most of us don't hunt for our own food like lions or lobsters, we buy it from other people who have bought it from yet other people. We 'swim' through a 'sea of people'. Just as a fish needs gills to survive in water, people need brains that make them able to deal with other people. Just as the sea is full of salt water, the sea of people is full of difficult things to learn. Like language.
You speak English but your friend Ann-Kathrin speaks German. You 246
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each speak the language that fits you to 'swim about' in your own separate 'people sea'. Language is passed down by tradition. There is no other way. In England, Pepe is a dog. In Germany he is ein Hund. Neither of these words is more correct, or more true than the other. Both are simply handed down. In order to be good at 'swimming about in their people sea', children have to learn the language of their own country, and lots of other things about their own people; and this means that they have to absorb, like blotting paper, an enormous amount of traditional information. (Remember that traditional infor- mation just means things that are handed down from grandparents to parents to children. ) The child's brain has to be a sucker for traditional information. And the child can't be expected to sort out good and useful traditional information, like the words of a language, from bad or silly traditional information, like believing in witches and devils and ever-living virgins.
It's a pity, but it can't help being the case, that because children have to be suckers for traditional information, they are likely to believe anything the grown-ups tell them, whether true or false, right or wrong. Lots of what the grown-ups tell them is true and based on evidence, or at least sensible. But if some of it is false, silly or even wicked, there is nothing to stop the children believing that too. Now, when the children grow up, what do they do? Well, of course, they tell it to the next generation of children. So, once something gets itself strongly believed - even if it is completely untrue and there never was any reason to believe it in the first place - it can go on forever.
Could this be what has happened with religions? Belief that there is a god or gods, belief in Heaven, belief that Mary never died, belief that Jesus never had a human father, belief that prayers are answered, belief that wine turns into blood - not one of these beliefs is backed up by any good evidence.
Yet millions of people believe them. Perhaps this is because they were told to believe them when they were young enough to believe anything.
Millions of other people believe quite different things, because they were told different things when they were children. Muslim children are told different things from Christian children, and both grow up utterly convinced that they are right and the others are wrong. Even within Christians, Roman Catholics believe different things from Church of England people or Episcopalians, Shakers or Quakers, Mormons or Holy Rollers, and all are utterly convinced that they are right and the others are wrong. They believe different things for exactly the same kind of reason as you speak English and Ann-Kathrin speaks German.
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Both languages are, in their own country, the right language to speak. But it can't be true that different religions are right in their own countries, because different religions claim that opposite things are true. Mary can't be alive in the Catholic Republic but dead in Protestant Northern Ireland.
What can we do about all this? It is not easy for you to do anything, because you are only ten. But you could try this. Next time somebody tells you something that sounds important, think to yourself: 'Is this the kind of thing that people probably know because of evidence? Or is it the kind of thing that people only believe because of tradition, authority or revelation? ' And, next time somebody tells you that something is true, why not say to them: 'What kind of evidence is there for that? ' And if they can't give you a good answer, I hope you'll think very carefully before you believe a word they say.
Your loving Daddy
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ENDNOTES
http://www. e-fabre. net/virtual library/more hunting wasp/chap04. htm
G. C. Williams, Plan & Purpose in Nature (New York, Basic Books, 1996), p. 157
http://www. apologeticspress. org/bibbul/2001/bb-01-75. htm
Anticipations of the reaction of mechanical and scientific progress upon human life and thought (London, Chapman and Hall, 1902)
J. Huxley, Essays of a Biologist (London, Chatto & Windus, 1926)
http://alephO. clarku. edu/huxley/CE9/E-E. html
R. Dawkins, The Selfish Gene (Oxford, Oxford University Press, 1976; 2nd edn 1989). R. Dawkins, The Blind Watchmaker (London, Longman, 1986; London, Penguin, 2000)
Huxley (1926), ibid.
J. Huxley, Essays of a Humanist (London, Penguin, 1966)
Theodosius Dobzhansky, 'Changing Man', Science, 155 (27 January 1967), 409
First published as 'Hall of Mirrors' in Forbes ASAP, 2 October 2000
Published in the UK as Intellectual Impostures (London, Profile Books, 1998). My review of this book is reprinted on page 47 as 'Postmodernism Disrobed' P. Gross and N. Levitt, Higher Superstition (Baltimore, The Johns Hopkins University Press, 1994)
D. Patai and N. Koertge, Professing Feminism: Cautionary Tales from the Strange World of Women's Studies (New York, Basic Books, 1994)
R. Dawkins, River Out of Eden (New York, Basic Books, 1995)
This interpretation of illusions is the one offered by our greatest living authority on them, Richard Gregory, Eye and Brain, 5th edn (Oxford, Oxford University Press, 1998)
L. Wolpert, The Unnatural Nature of Science (London, Faber & Faber, 1993) From P. Cavalieri and P. Singer (eds. ), The Great Ape Project (London, Fourth Estate, 1993)
R. Dawkins, Unweaving the Rainbow (London, Allen Lane/Penguin Press,
1998)
First published in The Observer, 16 November 1997
First published in the Sunday Telegraph, 18 October 1998
Review of Alan Sokal and Jean Bricmont, Intellectual Impostures (London,
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Profile Books, 1998); published in the US as Fashionable Nonsense (New York, Picador USA, 1998). Nature, 394 (9 July 1998), 141-3
P. B. Medawar, Pluto's Republic (Oxford, Oxford University Press, 1982) Originally published in The Guardian, 6 July 2002
H. G. Wells, The Story of a Great Schoolmaster: being a plain account of the life and ideas of Sanderson ofOundle (London, Chatto & Windus, 1924) Sanderson ofOundle (London, Chatto & Windus, 1926)
Originally published as the Foreword to the Student Edition of The Descent of Man (London, Gibson Square Books, 2002)
28
29
30
31
32
33
34
35 36
37
38
39 40 41 42
43 44
45
46
23 24 25
26 27
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'Letter to Wallace, 26 February 1867' in Francis Darwin (ed. ), Life and Letters of Charles Darwin, vol. 3 (London, John Murray, 1888), p. 95
H. Cronin, The Ant and the Peacock (Cambridge, Cambridge University Press, 1991)
W. D. Hamilton, Narrow Roads of Gene Land, vol. 2 (Oxford, Oxford University Press, 2001)
A. Zahavi and A. Zahavi, The Handicap Principle: a missing piece of Darwin's puzzle (Oxford, Oxford University Press, 1997)
R. A. Fisher, The Genetical Theory of Natural Selection (Oxford, Clarendon Press, 1930)
My own attempt at explaining it constitutes Chapter 8 of The Blind Watchmaker. For an authoritative modern survey of sexual selection, see M. Andersson, Sexual Selection (Princeton, Princeton University Press, 1994)
W. G. Eberhard, Sexual Selection and Animal Genitalia (Cambridge, Mass. , Harvard University Press, 1988)
D. Dennett, Darwin's Dangerous Idea (New York, Simon & Schuster, 1995) M. Ghiselin, The Triumph of the Darwinian Method (Berkeley, University of California Press, 1969)
R. Dawkins, 'Higher and Lower Animals: a Diatribe' in E. Fox-Keller and E. Lloyd (eds. ), Keywords in evolutionary biology (Cambridge, Mass. , Harvard University Press, 1992)
Charles Darwin, The Descent of Man, chapter XX of 1st edn, chapter XIX of 2nd edn
http://members. shaw. ca/mcfetridge/darwin. html
http://www. workersliberty. org/wlmags/wl61/dawkins. htm
Fisher (1930), ibid.
Letter dated 'Tuesday, February, 1866'. Published in James Marchant, Alfred Russel Wallace: Letters and Reminiscences, vol. 1 (London, Cassell, 1916). Reproduced by courtesy of the British Library, thanks to Dr Jeremy John Fisher (1930), ibid.
W. D. Hamilton, 'Extraordinary Sex Ratios' (1966). Reprinted in his Narrow Roads of Gene Land, vol. 1 (Oxford, W. H. Freeman, 1996)
E. L. Charnov, The Theory of Sex Allocation (Princeton, Princeton University Press, 1982)
A. W. F. Edwards, 'Natural Selection and the Sex Ratio: Fisher's Sources', American Naturalist, 151 (1998), 564-9
? R. L. Trivers, 'Parental investment and sexual selection' in B. Campbell (ed. ), Sexual Selection and the Descent of Man (Chicago, Aldine, 1972), pp. 136-79 R. Leakey, The Origin of Humankind (London, Weidenfeld & Nicolson, 1994) S. Pinker, The Language Instinct (London, Penguin, 1994)
S. J. Gould, Ontogeny and Phytogeny (Cambridge, Mass. , Harvard University Press, 1977)
J. Diamond, The Rise and Fall of the Third Chimpanzee (London, Radius, 1991) D. Morris, Dogs: The ultimate dictionary of over 1000 dog breeds (London, Ebury Press, 2001)
C. Vila, J. E. Maldonado and R. K. Wayne, 'Phylogenetic Relationships, Evolution, and Genetic Diversity of the Domestic Dog', Journal of Heredity, 90 (1999), 71-7
G. Miller, The Mating Mind (London, Heinemann, 2000)
From M. H. Robinson and L. Tiger (eds. ), Man and Beast Revisited (Washington, Smithsonian Institution Press, 1991)
R. Dawkins, 'Universal Darwinism' in D. S. Bendall (ed. ), Evolution from Molecules to Men (Cambridge, Cambridge University Press, 1983), pp. 403-25. R. Dawkins, The Blind Watchmaker (New York, W W. Norton, 1986), Chapter 11
C. Singer, A Short History of Biology (Oxford, Clarendon Press, 1931)
W. Bateson, quoted in E. Mayr, The Growth of Biological Thought: Diversity, Evolution, and Inheritance (Cambridge, Mass. , Harvard University Press, 1982) G. C. Williams, Adaptation and Natural Selection (Princeton, Princeton University Press, 1966)
R. A. Fisher, The Genetical Theory of Natural Selection (Oxford, Clarendon Press, 1930)
Dawkins, The Blind Watchmaker, p. 31
Peter Atkins, The Second Law (New York, Scientific American Books, 1984), and Galileo's Finger (Oxford, Oxford University Press, 2003) are characteristically lucid
R. Dawkins, Climbing Mount Improbable (London, Penguin, 1996), chapter 3
E. Mayr, The Growth of Biological Thought: Diversity, Evolution, and Inheritance (Cambridge, Mass. , Harvard University Press, 1982)
F. H. C. Crick, Life itself (London, Macdonald, 1982)
R. Dawkins, The Extended Phenotype (San Francisco, W. H. Freeman, 1982/ Oxford, Oxford University Press, 1999), pp. 174-6. See also Endnote 36 and Dawkins, The Blind Watchmaker, chapter 11
Originally published in the Skeptic, 18, No. 4, December 1998 (Sydney, Australia)
Originally published in the Daily Telegraph, 17 July 1993, under the title 'Don't panic; take comfort, it's not all in the genes'
D. H. Hamer et at. , 'A linkage between DNA markers on the X chromosome and male sexual orientation', Science, 261 (1993), 321-7
Originally published in J. Brockman (ed. ), The Next Fifty Years (New York, Vintage Books, 2002)
ENDNOTES
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80 81
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83 84 85 86
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88 89
90 91
92 93
See also the splendid article by Polly Toynbee in The Guardian of 5 October 252
S. Brenner, 'Theoretical Biology in the Third Millennium', Phil. Trans. Roy. Soc. B, 354 (1999), 1963-5
Page 25.
D. Dennett, Consciousness Explained (Boston, Little Brown, 1990). D. Dennett, Darwin's Dangerous Idea (New York, Simon & Schuster, 1995)
Foreword to S. Blackmore, The Meme Machine (Oxford, Oxford University Press, 1999)
J. D. Delius, 'The Nature of Culture' in M. S. Dawkins, T. R. Halliday and R. Dawkins (eds. ), The Tinbergen Legacy (London, Chapman & Hall, 1991) 'Culturgen' was proposed by C. J. Lumsden and E. O. Wilson in Genes, Mind and Culture (Cambridge, Mass. , Harvard University Press, 1981). Completely unknown to me when I coined 'meme' in 1976, the German biologist Richard Semon wrote a book called Die Mneme (English translation The Mneme (London, Allen & Unwin, 1921)) in which he adopted the 'mneme' coined in 1870 by the Austrian physiologist Ewald Hering. I first learned of this in a review of The Selfish Gene by Peter Medawar, who described the 'mneme' as 'a word of conscious etymological rectitude'
Originally published in B. Dahlbom (ed. ), Dennett and His Critics: Demystifying Mind (Oxford, Blackwell, 1993)
D. Dennett, Consciousness Explained (Boston, Little Brown, 1990), p. 207
H. Thimbleby, 'Can viruses ever be useful? ', Computers and Security, 10 (1991), 111-14
Sir Thomas Browne, Religio Medici (1635), I, 9
A. Zahavi, 'Mate selection - a selection for a handicap', Journal of Theoretical Biology, 53 (1975), 205-14
A. Grafen, 'Sexual selection unhandicapped by the Fisher process', Journal of Theoretical Biology, 144 (1990), 473-516. A. Grafen, 'Biological signals as handicaps', Journal of Theoretical Biology, 144 (1990), 517-46
M. Kilduff and R. Javers, The Suicide Cult (New York, Bantam, 1978)
A. Kenny, A Path from Rome (Oxford, Oxford University Press, 1986)
First published as 'Snake Oil and Holy Water' in Forbes ASAP, 4 October 1999 U. Goodenough, The Sacred Depths of Nature (New York, Oxford University Press Inc. , 1999)
C. Sagan, Pale Blue Dot: A Vision of the Human Future in Space (New York, Ballantine, 1997)
V. J. Stenger, The Unconscious Quantum (Buffalo, NY, Prometheus Books, 1996) The 'separate magisteria' thesis was promoted by S. J.
This last section, its title borrowed from W. B. Yeats, has a single item: an open letter to my daughter, written when she was ten. For most of her childhood, I unhappily saw her only for short periods at a time, and it was not easy to talk about the important things of life. I had always been scrupulously careful to avoid the smallest suggestion of infant indoctrination, which I think is ultimately responsible for much of the evil in the world. Others, less close to her, showed no such scruples, which upset me, as I very much wanted her, as I want all children, to make up her own mind freely when she became old enough to do so. I would encourage her to think, without telling her what to think. When she reached the age of ten, I thought about writing her a long letter. But to send it out of the blue seemed oddly formal and forbidding.
Then an opportunity fortuitously arose. My literary agent John Brockman, with his wife and partner Katinka Matson, conceived the idea of editing a book of essays as a rite-of-passage gift for their son Max. They invited clients and friends to contribute essays of advice or inspiration for a young person starting life. The invitation spurred me into writing, as an open letter, the advice to my daughter which I had previously been shy to give. The book itself, How Things Are, changed its mission halfway through its compilation. It remained dedicated to Max, but the subtitle became A Science Tool-kit for the Mind and later contributors were not asked to write specifically for a young person.
Eight years down the road, the legal onset of Juliet's adulthood happened to fall during the preparation of this collection, and the book is dedicated to her as an eighteenth birthday present, with a father's love.
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? Dear Juliet
Good and Bad Reasons for Believing144
Now that you are ten, I want to write to you about something that is important to me. Have you ever wondered how we know the things that we know? How do we know, for instance, that the stars, which look like tiny pinpricks in the sky, are really huge balls of fire like the Sun and very far away? And how do we know that the Earth is a smaller ball whirling round one of those stars, the Sun?
The answer to these questions is 'evidence'. Sometimes evidence means actually seeing (or hearing, feeling, smelling . . . ) that something is true. Astronauts have travelled far enough from the Earth to see with their own eyes that it is round. Sometimes our eyes need help. The 'evening star' looks like a bright twinkle in the sky but with a telescope you can see that it is a beautiful ball - the planet we call Venus. Something that you learn by direct seeing (or hearing or feeling . . . ) is called an observation.
Often evidence isn't just observation on its own, but observation always lies at the back of it. If there's been a murder, often nobody (except the murderer and the dead person! ) actually observed it. But detectives can gather together lots of other observations which may all point towards a particular suspect. If a person's fingerprints match those found on a dagger, this is evidence that he touched it. It doesn't prove that he did the murder, but it can help when it's joined up with lots of other evidence. Sometimes a detective can think about a whole lot of observations and suddenly realize that they all fall into place and make sense if so-and-so did the murder.
Scientists - the specialists in discovering what is true about the world and the universe - often work like detectives. They make a guess (called a hypothesis) about what might be true. They then say to themselves: if that were really true, we ought to see so-and-so. This is called a prediction. For example, if the world is really round, we can predict that a traveller, going on and on in the same direction, should eventually find himself back where he started. When a doctor says that you have
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measles he doesn't take one look at you and see measles. His first look gives him a hypothesis that you may have measles. Then he says to himself: if she really has measles, I ought to see . . . Then he runs through his list of predictions and tests them with his eyes (have you got spots? ), his hands (is your forehead hot? ), and his ears (does your chest wheeze in a measly way? ). Only then does he make his decision and say, 'I diagnose that the child has measles. ' Sometimes doctors need to do other tests like blood tests or X-rays, which help their eyes, hands and ears to make observations.
The way scientists use evidence to learn about the world is much cleverer and more complicated than I can say in a short letter. But now I want to move on from evidence, which is a good reason for believing something, and warn you against three bad reasons for believing anything. They are called 'tradition', 'authority' and 'revelation'.
First, tradition. A few months ago, I went on television to have a discussion with about 50 children. These children were invited because they'd been brought up in lots of different religions. Some had been brought up as Christians, others as Jews, Muslims, Hindus or Sikhs. The man with the microphone went from child to child, asking them what they believed. What they said shows up exactly what I mean by 'tradition'. Their beliefs turned out to have no connection with evidence. They just trotted out the beliefs of their parents and grandparents, which, in turn, were not based upon evidence either. They said things like, 'We Hindus believe so and so. ' 'We Muslims believe such and such. ' 'We Christians believe something else. '
Of course, since they all believed different things, they couldn't all be right. The man with the microphone seemed to think this quite proper, and he didn't even try to get them to argue out their differences with each other. But that isn't the point I want to make. I simply want to ask where their beliefs came from. They came from tradition. Tradition means beliefs handed down from grandparent to parent to child, and so on. Or from books handed down through the centuries. Traditional beliefs often start from almost nothing; perhaps somebody just makes them up originally, like the stories about Thor and Zeus. But after they've been handed down over some centuries, the mere fact that they are so old makes them seem special. People believe things simply because people have believed the same thing over centuries. That's tradition.
The trouble with tradition is that, no matter how long ago a story was made up, it is still exactly as true or untrue as the original story was. If you make up a story that isn't true, handing it down over any number of centuries doesn't make it any truer!
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Most people in England have been baptized into the Church of England, but this is only one of many branches of the Christian religion. There are other branches such as the Russian Orthodox, the Roman Catholic and the Methodist churches. They all believe different things. The Jewish religion and the Muslim religion are a bit more different still; and there are different kinds of Jews and of Muslims. People who believe even slightly different things from each other often go to war over their disagreements. So you might think that they must have some pretty good reasons - evidence - for believing what they believe. But actually their different beliefs are entirely due to different traditions.
Let's talk about one particular tradition. Roman Catholics believe that Mary, the mother of Jesus, was so special that she didn't die but was lifted bodily into Heaven. Other Christian traditions disagree, saying that Mary did die like anybody else. These other religions don't talk about her much and, unlike Roman Catholics, they don't call her the 'Queen of Heaven'. The tradition that Mary's body was lifted into Heaven is not a very old one. The Bible says nothing about how or when she died; in fact the poor woman is scarcely mentioned in the Bible at all. The belief that her body was lifted into Heaven wasn't invented until about six centuries after Jesus's time. At first it was just made up, in the same way as any story like Snow White was made up. But, over the centuries, it grew into a tradition and people started to take it seriously simply because the story had been handed down over so many generations. The older the tradition became, the more people took it seriously. It finally was written down as an official Roman Catholic belief only very recently, in 1950. But the story was no more true in 1950 than it was when it was first invented 600 years after Mary's death.
I'll come back to tradition at the end of my letter, and look at it in another way. But first I must deal with the two other bad reasons for believing in anything: authority and revelation.
Authority, as a reason for believing something, means believing it because you are told to believe it by somebody important. In the Roman Catholic Church, the Pope is the most important person, and people believe he must be right just because he is the Pope. In one branch of the Muslim religion, the important people are old men with beards called Ayatollahs. Lots of young Muslims are prepared to commit murder, purely because the Ayatollahs in a faraway country tell them to. *
? The fatwah against Salman Rushdie was prominently in the news at the time.
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When I say that it was only in 1950 that Roman Catholics were finally told that they had to believe that Mary's body shot off to Heaven, what I mean is that in 1950 the Pope told people that they had to believe it. That was it. The Pope said it was true, so it had to be true! Now, probably some of the things that Pope said in his life were true and some were not true. There is no good reason why, just because he was the Pope, you should believe everything he said, any more than you believe everything that lots of other people say. The present Pope has ordered his followers not to limit the number of babies they have. If people follow his authority as slavishly as he would wish, the results could be terrible famines, diseases and wars, caused by overcrowding.
Of course, even in science, sometimes we haven't seen the evidence ourselves and we have to take somebody else's word for it. I haven't, with my own eyes, seen the evidence that light travels at a speed of 186,000 miles per second. Instead, I believe books that tell me the speed of light. This looks like 'authority'. But actually it is much better than authority because the people who wrote the books have seen the evidence and anyone is free to look carefully at the evidence whenever they want. That is very comforting. But not even the priests claim that there is any evidence for their story about Mary's body zooming off to Heaven.
The third kind of bad reason for believing anything is called 'revelation'. If you had asked the Pope in 1950 how he knew that Mary's body disappeared into Heaven, he would probably have said that it had been 'revealed' to him. He shut himself in his room and prayed for guidance. He thought and thought, all by himself, and he became more and more sure inside himself. When religious people just have a feeling inside themselves that something must be true, even though there is no evidence that it is true, they call their feeling 'revelation'. It isn't only popes who claim to have revelations. Lots of religious people do. It is one of their main reasons for believing the things that they do believe. But is it a good reason?
Suppose I told you that your dog was dead. You'd be very upset, and you'd probably say, 'Are you sure? How do you know? How did it happen? ' Now suppose I answered: 'I don't actually know that Pepe is dead. I have no evidence. I just have this funny feeling deep inside me that he is dead. ' You'd be pretty cross with me for scaring you, because you'd know that an inside 'feeling' on its own is not a good reason for believing that a whippet is dead. You need evidence. We all have inside feelings from time to time, and sometimes they turn out to be right and sometimes they don't. Anyway, different people have opposite feelings,
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so how are we to decide whose feeling is right? The only way to be sure that a dog is dead is to see him dead, or hear that his heart has stopped; or be told by somebody who has seen or heard some real evidence that he is dead.
People sometimes say that you must believe in feelings deep inside, otherwise you'd never be confident of things like 'My wife loves me'. But this is a bad argument. There can be plenty of evidence that some- body loves you. All through the day when you are with somebody who loves you, you see and hear lots of little titbits of evidence, and they all add up. It isn't a purely inside feeling, like the feeling that priests call revelation. There are outside things to back up the inside feeling: looks in the eye, tender notes in the voice, little favours and kindnesses; this is all real evidence.
Sometimes people have a strong inside feeling that somebody loves them when it is not based upon any evidence, and then they are likely to be completely wrong. There are people with a strong inside feeling that a famous film star loves them, when really the film star hasn't even met them. People like that are ill in their minds. Inside feelings must be backed up by evidence, otherwise you just can't trust them.
Inside feelings are valuable in science too, but only for giving you ideas that you later test by looking for evidence. A scientist can have a 'hunch' about an idea that just 'feels' right. In itself, this is not a good reason for believing something. But it can be a good reason for spend- ing some time doing a particular experiment, or looking in a particular way for evidence. Scientists use inside feelings all the time to get ideas. But they are not worth anything until they are supported by evidence.
I promised that I'd come back to tradition, and look at it in another way. I want to try to explain why tradition is so important to us. All animals are built (by the process called evolution) to survive in the normal place in which their kind live. Lions are built to be good at surviving on the plains of Africa. Crayfish are built to be good at surviving in fresh water, while lobsters are built to be good at surviving in the salt sea. People are animals too, and we are built to be good at surviving in a world full of . . . other people. Most of us don't hunt for our own food like lions or lobsters, we buy it from other people who have bought it from yet other people. We 'swim' through a 'sea of people'. Just as a fish needs gills to survive in water, people need brains that make them able to deal with other people. Just as the sea is full of salt water, the sea of people is full of difficult things to learn. Like language.
You speak English but your friend Ann-Kathrin speaks German. You 246
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each speak the language that fits you to 'swim about' in your own separate 'people sea'. Language is passed down by tradition. There is no other way. In England, Pepe is a dog. In Germany he is ein Hund. Neither of these words is more correct, or more true than the other. Both are simply handed down. In order to be good at 'swimming about in their people sea', children have to learn the language of their own country, and lots of other things about their own people; and this means that they have to absorb, like blotting paper, an enormous amount of traditional information. (Remember that traditional infor- mation just means things that are handed down from grandparents to parents to children. ) The child's brain has to be a sucker for traditional information. And the child can't be expected to sort out good and useful traditional information, like the words of a language, from bad or silly traditional information, like believing in witches and devils and ever-living virgins.
It's a pity, but it can't help being the case, that because children have to be suckers for traditional information, they are likely to believe anything the grown-ups tell them, whether true or false, right or wrong. Lots of what the grown-ups tell them is true and based on evidence, or at least sensible. But if some of it is false, silly or even wicked, there is nothing to stop the children believing that too. Now, when the children grow up, what do they do? Well, of course, they tell it to the next generation of children. So, once something gets itself strongly believed - even if it is completely untrue and there never was any reason to believe it in the first place - it can go on forever.
Could this be what has happened with religions? Belief that there is a god or gods, belief in Heaven, belief that Mary never died, belief that Jesus never had a human father, belief that prayers are answered, belief that wine turns into blood - not one of these beliefs is backed up by any good evidence.
Yet millions of people believe them. Perhaps this is because they were told to believe them when they were young enough to believe anything.
Millions of other people believe quite different things, because they were told different things when they were children. Muslim children are told different things from Christian children, and both grow up utterly convinced that they are right and the others are wrong. Even within Christians, Roman Catholics believe different things from Church of England people or Episcopalians, Shakers or Quakers, Mormons or Holy Rollers, and all are utterly convinced that they are right and the others are wrong. They believe different things for exactly the same kind of reason as you speak English and Ann-Kathrin speaks German.
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Both languages are, in their own country, the right language to speak. But it can't be true that different religions are right in their own countries, because different religions claim that opposite things are true. Mary can't be alive in the Catholic Republic but dead in Protestant Northern Ireland.
What can we do about all this? It is not easy for you to do anything, because you are only ten. But you could try this. Next time somebody tells you something that sounds important, think to yourself: 'Is this the kind of thing that people probably know because of evidence? Or is it the kind of thing that people only believe because of tradition, authority or revelation? ' And, next time somebody tells you that something is true, why not say to them: 'What kind of evidence is there for that? ' And if they can't give you a good answer, I hope you'll think very carefully before you believe a word they say.
Your loving Daddy
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ENDNOTES
http://www. e-fabre. net/virtual library/more hunting wasp/chap04. htm
G. C. Williams, Plan & Purpose in Nature (New York, Basic Books, 1996), p. 157
http://www. apologeticspress. org/bibbul/2001/bb-01-75. htm
Anticipations of the reaction of mechanical and scientific progress upon human life and thought (London, Chapman and Hall, 1902)
J. Huxley, Essays of a Biologist (London, Chatto & Windus, 1926)
http://alephO. clarku. edu/huxley/CE9/E-E. html
R. Dawkins, The Selfish Gene (Oxford, Oxford University Press, 1976; 2nd edn 1989). R. Dawkins, The Blind Watchmaker (London, Longman, 1986; London, Penguin, 2000)
Huxley (1926), ibid.
J. Huxley, Essays of a Humanist (London, Penguin, 1966)
Theodosius Dobzhansky, 'Changing Man', Science, 155 (27 January 1967), 409
First published as 'Hall of Mirrors' in Forbes ASAP, 2 October 2000
Published in the UK as Intellectual Impostures (London, Profile Books, 1998). My review of this book is reprinted on page 47 as 'Postmodernism Disrobed' P. Gross and N. Levitt, Higher Superstition (Baltimore, The Johns Hopkins University Press, 1994)
D. Patai and N. Koertge, Professing Feminism: Cautionary Tales from the Strange World of Women's Studies (New York, Basic Books, 1994)
R. Dawkins, River Out of Eden (New York, Basic Books, 1995)
This interpretation of illusions is the one offered by our greatest living authority on them, Richard Gregory, Eye and Brain, 5th edn (Oxford, Oxford University Press, 1998)
L. Wolpert, The Unnatural Nature of Science (London, Faber & Faber, 1993) From P. Cavalieri and P. Singer (eds. ), The Great Ape Project (London, Fourth Estate, 1993)
R. Dawkins, Unweaving the Rainbow (London, Allen Lane/Penguin Press,
1998)
First published in The Observer, 16 November 1997
First published in the Sunday Telegraph, 18 October 1998
Review of Alan Sokal and Jean Bricmont, Intellectual Impostures (London,
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Profile Books, 1998); published in the US as Fashionable Nonsense (New York, Picador USA, 1998). Nature, 394 (9 July 1998), 141-3
P. B. Medawar, Pluto's Republic (Oxford, Oxford University Press, 1982) Originally published in The Guardian, 6 July 2002
H. G. Wells, The Story of a Great Schoolmaster: being a plain account of the life and ideas of Sanderson ofOundle (London, Chatto & Windus, 1924) Sanderson ofOundle (London, Chatto & Windus, 1926)
Originally published as the Foreword to the Student Edition of The Descent of Man (London, Gibson Square Books, 2002)
28
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35 36
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39 40 41 42
43 44
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46
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26 27
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'Letter to Wallace, 26 February 1867' in Francis Darwin (ed. ), Life and Letters of Charles Darwin, vol. 3 (London, John Murray, 1888), p. 95
H. Cronin, The Ant and the Peacock (Cambridge, Cambridge University Press, 1991)
W. D. Hamilton, Narrow Roads of Gene Land, vol. 2 (Oxford, Oxford University Press, 2001)
A. Zahavi and A. Zahavi, The Handicap Principle: a missing piece of Darwin's puzzle (Oxford, Oxford University Press, 1997)
R. A. Fisher, The Genetical Theory of Natural Selection (Oxford, Clarendon Press, 1930)
My own attempt at explaining it constitutes Chapter 8 of The Blind Watchmaker. For an authoritative modern survey of sexual selection, see M. Andersson, Sexual Selection (Princeton, Princeton University Press, 1994)
W. G. Eberhard, Sexual Selection and Animal Genitalia (Cambridge, Mass. , Harvard University Press, 1988)
D. Dennett, Darwin's Dangerous Idea (New York, Simon & Schuster, 1995) M. Ghiselin, The Triumph of the Darwinian Method (Berkeley, University of California Press, 1969)
R. Dawkins, 'Higher and Lower Animals: a Diatribe' in E. Fox-Keller and E. Lloyd (eds. ), Keywords in evolutionary biology (Cambridge, Mass. , Harvard University Press, 1992)
Charles Darwin, The Descent of Man, chapter XX of 1st edn, chapter XIX of 2nd edn
http://members. shaw. ca/mcfetridge/darwin. html
http://www. workersliberty. org/wlmags/wl61/dawkins. htm
Fisher (1930), ibid.
Letter dated 'Tuesday, February, 1866'. Published in James Marchant, Alfred Russel Wallace: Letters and Reminiscences, vol. 1 (London, Cassell, 1916). Reproduced by courtesy of the British Library, thanks to Dr Jeremy John Fisher (1930), ibid.
W. D. Hamilton, 'Extraordinary Sex Ratios' (1966). Reprinted in his Narrow Roads of Gene Land, vol. 1 (Oxford, W. H. Freeman, 1996)
E. L. Charnov, The Theory of Sex Allocation (Princeton, Princeton University Press, 1982)
A. W. F. Edwards, 'Natural Selection and the Sex Ratio: Fisher's Sources', American Naturalist, 151 (1998), 564-9
? R. L. Trivers, 'Parental investment and sexual selection' in B. Campbell (ed. ), Sexual Selection and the Descent of Man (Chicago, Aldine, 1972), pp. 136-79 R. Leakey, The Origin of Humankind (London, Weidenfeld & Nicolson, 1994) S. Pinker, The Language Instinct (London, Penguin, 1994)
S. J. Gould, Ontogeny and Phytogeny (Cambridge, Mass. , Harvard University Press, 1977)
J. Diamond, The Rise and Fall of the Third Chimpanzee (London, Radius, 1991) D. Morris, Dogs: The ultimate dictionary of over 1000 dog breeds (London, Ebury Press, 2001)
C. Vila, J. E. Maldonado and R. K. Wayne, 'Phylogenetic Relationships, Evolution, and Genetic Diversity of the Domestic Dog', Journal of Heredity, 90 (1999), 71-7
G. Miller, The Mating Mind (London, Heinemann, 2000)
From M. H. Robinson and L. Tiger (eds. ), Man and Beast Revisited (Washington, Smithsonian Institution Press, 1991)
R. Dawkins, 'Universal Darwinism' in D. S. Bendall (ed. ), Evolution from Molecules to Men (Cambridge, Cambridge University Press, 1983), pp. 403-25. R. Dawkins, The Blind Watchmaker (New York, W W. Norton, 1986), Chapter 11
C. Singer, A Short History of Biology (Oxford, Clarendon Press, 1931)
W. Bateson, quoted in E. Mayr, The Growth of Biological Thought: Diversity, Evolution, and Inheritance (Cambridge, Mass. , Harvard University Press, 1982) G. C. Williams, Adaptation and Natural Selection (Princeton, Princeton University Press, 1966)
R. A. Fisher, The Genetical Theory of Natural Selection (Oxford, Clarendon Press, 1930)
Dawkins, The Blind Watchmaker, p. 31
Peter Atkins, The Second Law (New York, Scientific American Books, 1984), and Galileo's Finger (Oxford, Oxford University Press, 2003) are characteristically lucid
R. Dawkins, Climbing Mount Improbable (London, Penguin, 1996), chapter 3
E. Mayr, The Growth of Biological Thought: Diversity, Evolution, and Inheritance (Cambridge, Mass. , Harvard University Press, 1982)
F. H. C. Crick, Life itself (London, Macdonald, 1982)
R. Dawkins, The Extended Phenotype (San Francisco, W. H. Freeman, 1982/ Oxford, Oxford University Press, 1999), pp. 174-6. See also Endnote 36 and Dawkins, The Blind Watchmaker, chapter 11
Originally published in the Skeptic, 18, No. 4, December 1998 (Sydney, Australia)
Originally published in the Daily Telegraph, 17 July 1993, under the title 'Don't panic; take comfort, it's not all in the genes'
D. H. Hamer et at. , 'A linkage between DNA markers on the X chromosome and male sexual orientation', Science, 261 (1993), 321-7
Originally published in J. Brockman (ed. ), The Next Fifty Years (New York, Vintage Books, 2002)
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See also the splendid article by Polly Toynbee in The Guardian of 5 October 252
S. Brenner, 'Theoretical Biology in the Third Millennium', Phil. Trans. Roy. Soc. B, 354 (1999), 1963-5
Page 25.
D. Dennett, Consciousness Explained (Boston, Little Brown, 1990). D. Dennett, Darwin's Dangerous Idea (New York, Simon & Schuster, 1995)
Foreword to S. Blackmore, The Meme Machine (Oxford, Oxford University Press, 1999)
J. D. Delius, 'The Nature of Culture' in M. S. Dawkins, T. R. Halliday and R. Dawkins (eds. ), The Tinbergen Legacy (London, Chapman & Hall, 1991) 'Culturgen' was proposed by C. J. Lumsden and E. O. Wilson in Genes, Mind and Culture (Cambridge, Mass. , Harvard University Press, 1981). Completely unknown to me when I coined 'meme' in 1976, the German biologist Richard Semon wrote a book called Die Mneme (English translation The Mneme (London, Allen & Unwin, 1921)) in which he adopted the 'mneme' coined in 1870 by the Austrian physiologist Ewald Hering. I first learned of this in a review of The Selfish Gene by Peter Medawar, who described the 'mneme' as 'a word of conscious etymological rectitude'
Originally published in B. Dahlbom (ed. ), Dennett and His Critics: Demystifying Mind (Oxford, Blackwell, 1993)
D. Dennett, Consciousness Explained (Boston, Little Brown, 1990), p. 207
H. Thimbleby, 'Can viruses ever be useful? ', Computers and Security, 10 (1991), 111-14
Sir Thomas Browne, Religio Medici (1635), I, 9
A. Zahavi, 'Mate selection - a selection for a handicap', Journal of Theoretical Biology, 53 (1975), 205-14
A. Grafen, 'Sexual selection unhandicapped by the Fisher process', Journal of Theoretical Biology, 144 (1990), 473-516. A. Grafen, 'Biological signals as handicaps', Journal of Theoretical Biology, 144 (1990), 517-46
M. Kilduff and R. Javers, The Suicide Cult (New York, Bantam, 1978)
A. Kenny, A Path from Rome (Oxford, Oxford University Press, 1986)
First published as 'Snake Oil and Holy Water' in Forbes ASAP, 4 October 1999 U. Goodenough, The Sacred Depths of Nature (New York, Oxford University Press Inc. , 1999)
C. Sagan, Pale Blue Dot: A Vision of the Human Future in Space (New York, Ballantine, 1997)
V. J. Stenger, The Unconscious Quantum (Buffalo, NY, Prometheus Books, 1996) The 'separate magisteria' thesis was promoted by S. J.
