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An Assessment of Richard Dawkins' book `The Blind Watchmaker' By Rev Howard Taylor. |
| Richard Dawkins is a well
known
professional
Zoologist. He loves public debate and
often appears on British
television
as an
exponent of scientific materialistic atheism.
He is very often very scathing indeed about those who disagree with him. Some parts of this article are very critical of his arguments but I hope my language is not as strong as his against his opponents. His very influential book The Blind Watchmaker was first published by Longman in l986. Not long after its publication it was supported and given prominence by a BBC television program. In 1988 it was republished by Penguin. It has also been translated into many languages and has had considerable influence world wide. He took its title from the Rev. William Paley's 19th Century writing. William Paley argued that just as a watch does not come into existence by accidental processes but needs a watchmaker, so the complex mechanisms of the natural world could not have come into existence by chance but need a Maker namely God. The purpose of Dawkins book The Blind Watchmaker is to attempt to show that the amazing complexities of life were brought into existence by the process of 'natural selection' which can be understood in purely materialistic terms. There is no need for belief in God. Natural selection has no mind or sight of
its
own. It
is
therefore 'blind'. Nevertheless he claims to believe it
is the controlling process which has produced the
incredible complexity
of life we see around us today.
Dawkins several times denies that evolution is a random or
chance process. However the way he explains his
theory does show that
chance or random processes do
play a very vital role in the whole
process.
It was Charles Darwin who was one of the first to recognise this process which is popularly called evolution. Dawkins argues his case with considerable wit and creative thinking and rightly demolishes many arguments of opponents of Darwin. Many of his points are penetrating. His book has received great praise from academics and journalists alike. Even churchmen, no doubt anxious to demonstrate their secular credentials in our materialistic age, have lavished praise upon the book. I fear though, that those who have heaped adulation on the book have been so dazzled by his brilliant style that they have been unable to recognise its serious flaws. (For my assessment of the so-called Intelligent Design movement, click here.) I would not presume to argue with him as a zoologist or biologist. I am not competent to get into all the scientific details. However I can easily follow Dawkins' actual arguments. At their most crucial points they are not scientific and they are not difficult to comprehend. If one can get behind his marvellous and creative rhetoric and listen to the actual case he is making, one will see that it is flawed at its most decisive points. Interestingly he says that until Darwin published his Origin of Species in 1859 "it was not possible to be an intellectually fulfilled atheist." (pp. 5-6). Although philosophers may have said that no explanation was needed for the complexity of nature, Dawkins believes that in their 'heart of hearts' they knew such an explanation was needed. In fact scattered through his first chapter entitled 'Explaining the Very Improbable' he uses similar arguments against classical atheism that I used in my booklet The Delusion of Unbelief in a Scientific Age.(published by Handsel Press in 1987). However Dawkins claims to believe that Darwin saved the day
for the
atheist because
Darwin's theory of evolution by natural
selection
provides
the key to
understanding the mystery of life without God. But to return to the matter in hand. Dawkins frequently refers to the famous astronomer and writer Fred Hoyle who, although not a believer in the God of the Bible, rejects Darwinism and evolution as expounded by biologists such as Dawkins. Hoyle proposes some extra-terrestrial intelligence as the source of life on earth. Dawkins accuses Fred Hoyle of misunderstanding Darwinism. But in fact it is Dawkins who misunderstands Fred Hoyle. Fred Hoyle is famous for his junkyard illustration. What are the chances of a whirlwind blowing through a junkyard assembling a Jumbo Jet from its pieces scattered about the Junkyard? Of course there is no chance that it would ever happen. Fred Hoyle says that life is so so complex that to say it came into existence by chance processes is like saying that the whirlwind assembled the Jumbo Jet. Now Dawkins claims that Fred Hoyle has missed the point. Dawkins says that evolution of such wonderful mechanisms as the 'eye' do not need such a huge 'single step' increase in complexity. Dawkins says that the increase in complexity comes gradually over millions of years. Natural selection is a cumulative process, which weeds out unhelpful changes in a species and preserves those changes most able to help the species to adapt, compete and survive. This indeed is the essence of much of Dawkins' book. Successive increases in complexity are very small but given millions of generations they explain life as it is today. But has Fred Hoyle really missed the point? Some critics of Hoyle say that he is exaggerating what is needed for the formation of life. Biologists can argue about this and I am not competent to judge between them. However what is clear is that Hoyle definitely is not talking about the formation of the eye as Dawkins alleges. The junkyard illustration comes at the end of a chapter in which he is discussing the chances of producing the proteins needed by our cells. He tells us that the chances of producing just one protein (which isn't even alive or capable of self-replication) is like a blind-folded man solving a rubic cube by accident. He tells us that such a man would need 100 times the age of the universe to accidentally solve the rubic cube. Even the simple bacterium is nothing less than a highly complex computer program (the DNA) connected to a highly complex chemical factory (the cytoplasm) with an amazing translation and communication system (the RNA). Even if such a complex mechanism as a bacterium was not needed at first, and even if Hoyle has exagerated the complexity necessary for early proteins, Dawkins admits that the formation of a molecule capable of starting the cumulative selection process needed a huge single-step increase in complexity. This is the subject of his chapter 6 'Origins & Miracles'. He says "we cannot escape the need to postulate a single-step (his emphasis) chance event in the origin of cumulative selection itself" (p. 140). Earlier in the book (p. 91) Dawkins says: (The logic is the same whether we are discussing the orgin of an actual 'organ' or whether we are discussing the origin of any highly complex biological entity.) Two chapters later he acknowledges that the cumulative
selection
is both
very complex and could not have come into existence by
cumulative
selection.
(It is obvious that you can't use
'cumulative
selection'
to
explain the start of 'cumulative
selection'.) So if he is
consistent
to the logic
referred to two paragraphs above he should give
up
Darwinism. Commenting on Anthony Flew's change of mind, Dr. Jonathan Witt writing to the Times (22nd December 2004) says: "Peering into the world of even the simplest functional, self-reproducing cell — the thing Darwinism needs before it can even begin to work — Flew finds a world of intricate circuits, miniaturised motors and enough digital code to fill an encyclopedia. Natural selection can’t build this bit by bit. It needs life first. Nor can the natural outworking of the laws of nature. Flew and the rest of us are waiting for a detailed, credible description of how such complexity occurred without design. Bold assertions, prestigious degrees and handwaving don’t count." To clarify matters we ask what level of complexity does Dawkins believe is necessary for cumulative selection to get started? Like Fred Hoyle he too has an illustration. It is not the Jumbo Jet (in the junkyard) but a Xerox copying machine. He says It can copy things but it can't spring into existence all by itself! What is needed in this 'copying machine'? Dawkins tells us it is a 'machine tool' that needs to be guided by RNA. (RNA is a code that is made by the bacterium.) However there is no bacterium at this stage because life has not yet started. Both the RNA and the machine tool have to come into being by the 'single step' that Dawkins says is necessary for this origin of cumulative selection. Of course the example of the Xerox machine or a watch are
only illustrations. Dawkins knows that a Xerox
machine cannot come into
existence by itself in a
'single step' move. However the he likens the
problem
of the genesis of life to just that. So what actually is required to arise spontaneously (not gradually)? He tells us that the “spontaneous arising of DNA or RNA” is what he is trying to explain. (page 146). He calls this thing that needs to arise in a single step 'life' (page 139). Now what does he mean by ‘life’? In a moment we will see the answer he gives. Note here I am not engaging with other atheist theories on the origin of life. (Not that I think they can possibly be successful). I am rather looking at the arguments that Dawkins uses. However it is worth noting that about ten years after Dawkins wrote the Blind Watchmaker the Encyclopaedia Britannica said of the origin of life: A critical and unsolved problem in the origin of life is the origin of the genetic code. The molecular apparatus supporting the operation of the code the activating enzymes, adapter RNAs, messenger RNAs, and so on are themselves each produced according to instructions contained within the code. At the time of the origin of the code such an elaborate molecular apparatus was of course absent. So then how does he explain the formation of the cumulative selection, or putting it another way how does he explain how the something comparable to a Xerox machine or a watch came into existence all by themselves? He uses a simple argument. Although the chances are small, there are so many planets in the universe (perhaps 10^20 he says) it was likely to happen somewhere and so it did on planet earth! But is this a valid argument? If Dawkins is right then there is possibly a working machine whose complexity and information content could reasonably be illustrated by the examples of a watch or Xerox machine on another planet somewhere in the universe. Although it is very very unlikely that the forces of nature could have put together these things by accident there are so many billions of planets that it may indeed have happened on one of them. Does the reader believe it possible? No, and you can be sure Dawkins doesn't either. Some may respond by saying the Xerox machine is just his illustration. Okay, lets put it another way. Supposing now we were to discover writing conveying information, would anyone believe that such a phenomenon would ever some into existence by chance even if there were an infinite number of planets? Governments are pouring big sums of money into the search for extra-terrestiral intelligent life. What astronomers are looking for is evidence of language coming from distant planets. Regular beeps will be insufficient to prove that intelligent life is the source. Such beeps could be the result of the physical properties of stella objects. However if they detect an actual language conveying useful instructions or information about universal mathematical truths such as: 'After 1 and 2 the number 11 is the fourth prime number' (Only about 60 letters when put into English) - they will have found intelligence. (Words and sentences in a book are not deducible from the chemistry of the ink and paper, because they have their origin in someone's mind). They will not conclude that it is just a mindless coincidence and that the possible existence of 10^20 planets explains it without reference to any intelligent source. Similarly if archaeologists discover meaningful and useful writing on an ancient stone they will not say: Oh well there are billions of stones on earth, we don't need to posit intelligence as its source. Why do I use this example of useful language? Because Dawkins tells us that RNA or DNA (forms of useful language) had to arise 'spontaneously' (page 146). Earlier n the book he tells us that 'life' is all about information in words and language. For example on p.112 he writes: "What lies at the heart of every living thing is not a fire, warm breath, nor a 'spark of life'. It is information, words, instructions . . . Think of a billion discrete digital characters . . . If you want to understand life, think about information technology." (Remember later in his book (page 139) he starts his explanation of how 'life' got started spontaneously.) Lets though be generous to Dawkins and assume that he is describing something much more simple than his quote above implies. However, whatever we concede, the analogy of writing does adequately describe his problem. Speaking of the information content of the simplest cell of life (in the DNA & RNA) the mathematician Douglas R. Hofstadter in his brilliant book Godel, Escher, Bach - An Eternal Golden Braid (published by Penguin in 1979) says (p.54): "A natural and fundamental question to ask, on learning of these incredibly, intricately interlocking pieces of software and hardware is: 'How did they ever get started in the first place?' . . . from simple molecules to entire cells is almost beyond one's power to imagine. There are various theories on the origin of life. They all run aground on this most central of central questions: 'How did the Genetic Code, along with the mechanisms for it translation originate?'" We shall come back to the information content of life later on, when we will note that the physical world (not just the living biological world) is also packed with information at its fundamental levels. Judging by his comments on Physics in the very first page of his book this most important point seems to have passed Dawkins by. But let us return to Dawkins' main point in his chapter on Origins. Remember he estimates that there may be 10^20 (100 billion billion) planets in the universe and that therefore as long as the odds are not more than 10^20 to 1 against the formation of the simplest form of life in a single step move then his theory is O.K. He says that these odds are probably "ample to accommodate the spontaneous arising of DNA or RNA”. Significantly Dawkins does not even attempt to explain why he thinks 10^20 to 1 is sufficient odds. It is just an assertion he makes. So it is not surprising to read Dawkins' confession on page
158: "Does it sound to you as though it would need a miracle to make randomly jostling atoms join together into a self replicating molecule? Well, at times it does to me too." Earlier in the chapter he anticipates this difficulty by saying that to say that God created life would not help because then we are left with the question of the origin of God. Later on I will show the fallacy behind this point. But perhaps Dawkins will say that the first RNA or DNA to appear were simpler than the ones we know of today. Let us consider the E. Coli cell. It could be written thus: CCGTCAGGATT . ........ on and on and on for approximately the length of the whole Bible. This of course cannot be just a jumble of 'letters'. They have to be in precise sequence to instruct the cell to manufacture the particular proteins needed. (To write out the code for a cell in a human being would require about 500 Bibles for each cell). Now let us for the sake of argument assume that the most primitive RNA or DNA at the beginning of life needed only the length of the New Testament - no, let us be really generous to Dawkins and assume only a few chapters length would be enough. Let us reduce it even further and say we only need a few sentences – totalling 50 letters (say) - giving useful information. How long would we expect a monkey to go on typing before he accidentally typed out the right sequence to tell us - not just anything, but something we needed to know? If he typed one letter per second it would still be a time many times greater than the age of the universe. Dawkins goes to great lengths to describe an experiment on his own computer. What are the chances of random processes in the computer accidentally typing out Dawkins' chosen sentence: 'Me thinks it is a weasel'. If the computer is given this sentence as a long term goal and if it is allowed to select from each random attempt the most favourable jumble of letters and build upon that, then Dawkins tells us that it would take a mere 40 attempts (or 'generations') to produce something approaching the desired sentence. (Incidentally 'Me thinks it is a weasel.' is not only very short, it conveys next to no useful information or instruction - unlike even primitive DNA or RNA.) But, apart from my above comment in parenthesis, we have reached a crucial point. Dawkins acknowledges at this point in his discussion that natural selection does not have any long-term goal. It is 'blind'. At this point in the book I thought Dawkins was going to show that 'Me thinks it is a weasel' could be reached even without a goal written into the program. But no! He drops the aim of the computer reaching the sentence and changes it for computer drawings (p.50). So he turns away from language (however short and simple) and shows how computer drawings can change to resemble insects. But this is to abandon the very very important point that the supposed development of life is all about the development of language and information. (Incidentally I do not see why Dawkins is so pleasantly surprised that his computer program produces insect-like pictures. Given his method of selection it is not surprising at all especially as the changes are based on tree like-branching). Even if we grant that a self replicating molecule of this simplicity could exist, so that the process of cumulative selection could begin, then the progress evolution would have to make to reach, oak trees, elephants, whales and human being would be that much greater. But for the sake of argument, let us grant that a self replicating RNA or DNA molecule, did come into existence by chance processes in the single step move that Dawkins acknowledges was necessary. It is from this basic constituent of 'life' (as we have seen this is the word Dawkins' uses on page 139) that the necessary process of evolution is supposed to have started. How does this basic form of life (with no leaves, roots, bones, eyes, ears, feathers, fur, teeth, claws, lungs, heart, brain etc. etc.) change into the amazing variety of plant, animal and human life all around us today. Dawkins believes that chance processes bring mutations (changes) that cause the variety of life to evolve from the first cell of life. The chance processes are random changes in the DNA code which can occur when a 'parent' brings forth offspring. Occasionally copying errors occur and so a random change
occurs in
the following
generation's DNA code. These
infrequent
changes
usually
produce harmful or lethal effects in the species
but
occasionally
produce
beneficial changes for the next generation.
Before we go on I give a brief summary of the theory behind
mutations. I owe this to Denis Alexander. Beneficial changes are obviously more fit to survive and so they do and pass on their new benefits to succeeding generations. . . and so the process of evolution of species continues on. He rightly rules out the possibility of large-scale changes taking place in one single step move. It is on this point that he so strongly disagrees with his fellow world famous evolutionary biologist: Stephen Jay Gould. Gould like Dawkins does not want God in the picture. However Gould points out that the fossil record shows relatively sudden appearances of well developed life. Gould believes that this shows that large scale changes did take very quickly indeed - relatively speaking. Dawkins accepts that the fossil record does seem to show
this. However
he can't
accept it. He says that it is giving ground to
the
creationists
(Page
230). This 'Dawkins-Gould' argument is not part of my main thesis so I only mention it in passing. The reader can find Dawkins criticism of Gould in Chapter 9. Fundamental to his book is that small changes that accumulate over many generations can explain the incredible complexity we see in life today. How many generations? He reckons that the age
of the
planet earth will
allow us 100 million (10^8)
generations.
Is this enough?
Let us consider one example - the human
brain.
Perhaps Dawkins would not agree with Professor Ambrose's description of the brain? But he does agree. He writes on the first page of the preface "The brain with which you are understanding my words is an array of some ten million kiloneurones. Many of these billions of nerve cells have each more than a thousand 'electric wires' connecting them to other neurones." Now to suggest as Dawkins does that only 100 million generations of small changes could produce such complexity is absurd. And of course the brain is only one amongst countless wonders of the living world. Dawkins himself gives us a description of the wonders of the eye (p.16-17), and the sonar skills of the bat (Chapter 2). Does he really believe 10^8 generations are enough to explain all this? Elsewhere in his book he tells us that the DNA that controls the Willow tree has as much information as thirty volumes of the Encyclopaedia Britannica. His sentence 'Me thinks it is a weasel' is a very very feeble and inadequate starting point for life even given 100 million generations, especially, as he acknowledges, natural selection is not aiming at producing anything. It is a blind process that merely preserves random improvements. Can such wonderful order really have arisen without an Intelligent Mind bringing it to being? Now I want to go on by
commenting about origin of the order we see
everywhere around us. The
science of 'order' is not
simple. There are many different kinds of
'order'.
For example the complexity of a Jumbo Jet is very different
from the order of such letters we might
find such as ABC ABC ABC
- on and on and on. If
we found such 'writing' (regular but conveying
no
useful instruction or information) we would still assume that
it had not come into existence by chance. It
must have produced by a
simple mathematical
instruction or physical process - but not
necessarily
an intelligent mind. Nevertheless we would still be forced
to ask the question as to why physical things
have certain properties
(and not others) which
produce this order, or alternatively who wrote
the
mathematical algorithm. It is only a superficial
conclusion that 'mind' is not needed.
When we press the question - but
'Why this and not
that?' we can't avoid mind as the ultimate origin
of
all things. More of this below. However, as noted earlier in
this article, if we discovered writing not having
a regular pattern
(like ABC ABC ABC etc etc), but
instead conveying useful instructions,
(like a
language or code) that would be different. We would immediately assume
intelligent mind was its ultimate origin. These issues relating
to very different kinds or complexity
and order are explored very
fully in theoretical
physicist Professor Paul Davies's book: The Fifth
Miracle. He
relates his study to the
issues of life and biology - issues that
we
have been discussing in this review of The Blind Watchmaker. Although Paul Davies claims no particular
religious commitment I certainly recommend
his book for careful study. The underlying assumption of
all modern science (an assumption I accept)
is that
physical existence has a rational
structure open to investigation
by science. Certain
effects have certain causes because of the way
nature
is. I wonder if this is what Einstein meant when he said: Science without religion is lame. However as the arch sceptical
philosopher David Hume showed we cannot
assume that effects have causes
unless we believe in
'laws of nature'. He argued that we cannot,
by
observation, conclude that there are such laws and
therefore we cannot
assume that because event A has
previously always followed event B that
it will
continue to do so tomorrow. Although Hume's argument is
difficult to counter, almost all of us do assume
that such 'laws'
exist. Many (such as Isaac Newton)
argued that such an assumption is
based on the
religious belief that there is one Law
Giver. The 'laws of nature' or rather the
rational structure of nature depends on Something
beyond mere physical
existence. This is what the
ancient Greek philosophers realised when
they noted
that nature has structure and concluded that it must be
infused with a non physical element: 'mind' or
'nous'. Einstein again: The only incomprehensible thing about the
universe is that it is
comprehensible'. It was this obvious rational
comprehensible structure that gave him (in
his later life) a case
against those who thought
physical existence alone could
explain
everything. A more modern author, who
with Dawkins, is a founder of
'sociobiology' is Edward Wilson.
He, like Dawkins,
believes that the whole of reality can be
explained
by reductionist science. In a short passage
in his prize winning book Consilience he wonders why the universe is
ordered. He writes of
the "fortunate
comprehensibility
of the
universe", and says of the
world
that it is "surprisingly well
ordered".
(Page 50). He gives no
explanation for this 'fortunate
comprehensiblity of the universe'.
Indeed he
cannot. My final main point is rather
different - though related to the above in a
profound way. Let us just suppose the impossible
that the origin and development of life
has a purely physical
explanation. But that leaves us
with the question: What actually is
physical matter?
It was one of the many questions which
Bertrand
Russell (atheist/agnostic) philosopher
acknowledged can have no answer
in science. (See
his Introduction to 'History of
Western Philosophy'.)
But why cannot it
have an answer? If we ask 'What is everything
made
of?' we are faced with various basic
alternatives. 1. If we keep
dividing up matter into
ever smaller and smaller constituents and
this
process goes on forever we will have progressed
in knowledge but not
answered the question. 2.
Alternatively if we reach a point where we
know there
is no further to go in the analysis of physical matter we
will have reached a particle that is made of
nothing else. But
something that has no constituent
is not really 'matter' at all.
Leibniz (Whom Bertrand
Russell regarded as one of the greatest minds of
all
time) realised this. He said that if any particle that has finite
size cannot be fundamental because it will be
capable of being split
further. He concluded that a
real fundamental particle (if such a thing
exists)
must be infinitely small. However since the essence of matter
is that it occupies space, such a 'particle'
could not be matter. He
therefore called it a 'soul'.
This resonates with the discovery of what
Paul Davies
calls the 'ghostly' world of quantum physics. This of course brings us back to
life and DNA etc. For as Dawkins tells us that is
a form of language. I am reminded of what guided Einstein. "We
are in the position,
of a little child entering a huge library,
whose
walls are covered to the ceiling with books in
many different
languages. The child
knows
that someone must have written those
books.
It does not know who or how. It does
not understand the languages in
which they are
written. The child notes a definite plan in
the
arrangement of the books, a mysterious order,
which it does not
comprehend but only dimly
suspects." (Quoted by David Bodanis in
his
book: E=mc^2) (Emphasis added). So how is mind known? I can
only know your mind by hearing you speak or
communicate in words. Words
express minds. By
examining your brain I could never discover
your
thoughts - I could never discover your mind.
However if I have a
personal relationship with you,
listening to what you say, I can
learn
something of your mind. If we close our hearts
and
minds to this Word then we closed our mind to Ulitmate Reality and
the Source of nature's wonderful order. We may
look for other ways of
knowing ultimate reality but
we will be ever closed to its truth. But
why should
we want to do that? That is another story. _________ Although, no doubt Dawkins means this as a rhetorical
sentence, its rhetoric can only be
effective if the sentence makes any
sense. But it
doesn't. When the enquirer has seen this, he will draw his own
conclusions
about its
metaphysical implications and find in the Bible the 'Word of
Life'. If anyone would like to read a critique of my article I
suggest he look at:
http://www.emotel.co.uk/FM%20against%20Dawkins.htm For a simlar view to mine re the alleged power of radom mutation and natural selection I suggest the reader consider an advert put in the New York Times by large numbers of hightly resplected scientists. It can be found at: http://www.hgtaylor.net/scientists-against-darwinsim.pdf If one wishes to read other articles criticising and
defending Richard Dawkins' theories, a good
source is: the Royal Institute of
Philosophy's
articles page at:
http://www.royalinstitutephilosophy.org/articles/articles.htm. If any of the above has assisted
you
in your
thinking, study or
preparation please fill in a Feedback form
(see
'Feedback'
link below)
stating to which article/sermon note/book review etc
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