The TimesOnline (go here) has an extract from Dawkins’ latest book, THE GREATEST SHOW ON EARTH. Here’s an extract of the extract:
…Evolution is a fact. Beyond reasonable doubt, beyond serious doubt, beyond sane, informed, intelligent doubt, beyond doubt evolution is a fact. The evidence for evolution is at least as strong as the evidence for the Holocaust, even allowing for eye witnesses to the Holocaust. It is the plain truth that we are cousins of chimpanzees, somewhat more distant cousins of monkeys, more distant cousins still of aardvarks and manatees, yet more distant cousins of bananas and turnips . . . continue the list as long as desired. That didn’t have to be true. It is not self-evidently, tautologically, obviously true, and there was a time when most people, even educated people, thought it wasn’t. It didn’t have to be true, but it is. We know this because a rising flood of evidence supports it. Evolution is a fact, and [my] book will demonstrate it. No reputable scientist disputes it, and no unbiased reader will close the book doubting it.
Why, then, do we speak of “Darwin’s theory of evolution”, thereby, it seems, giving spurious comfort to those of a creationist persuasion — the history-deniers, the 40-percenters — who think the word “theory” is a concession, handing them some kind of gift or victory? Evolution is a theory in the same sense as the heliocentric theory. In neither case should the word “only” be used, as in “only a theory”. As for the claim that evolution has never been “proved”, proof is a notion that scientists have been intimidated into mistrusting.
Influential philosophers tell us we can’t prove anything in science.
Mathematicians can prove things — according to one strict view, they are the only people who can — but the best that scientists can do is fail to disprove things while pointing to how hard they tried. Even the undisputed theory that the Moon is smaller than the Sun cannot, to the satisfaction of a certain kind of philosopher, be proved in the way that, for example, the Pythagorean Theorem can be proved. But massive accretions of evidence support it so strongly that to deny it the status of “fact” seems ridiculous to all but pedants. The same is true of evolution. Evolution is a fact in the same sense as it is a fact that Paris is in the northern hemisphere. Though logic-choppers rule the town,* some theories are beyond sensible doubt, and we call them facts. The more energetically and thoroughly you try to disprove a theory, if it survives the assault, the more closely it approaches what common sense happily calls a fact.
We are like detectives who come on the scene after a crime has been committed. The murderer’s actions have vanished into the past.
The detective has no hope of witnessing the actual crime with his own eyes. What the detective does have is traces that remain, and there is a great deal to trust there. There are footprints, fingerprints (and nowadays DNA fingerprints too), bloodstains, letters, diaries. The world is the way the world should be if this and this history, but not that and that history, led up to the present.
Evolution is an inescapable fact, and we should celebrate its astonishing power, simplicity and beauty. Evolution is within us, around us, between us, and its workings are embedded in the rocks of aeons past. Given that, in most cases, we don’t live long enough to watch evolution happening before our eyes, we shall revisit the metaphor of the detective coming upon the scene of a crime after the event and making inferences. The aids to inference that lead scientists to the fact of evolution are far more numerous, more convincing, more incontrovertible, than any eyewitness reports that have ever been used, in any court of law, in any century, to establish guilt in any crime. Proof beyond reasonable doubt? Reasonable doubt? That is the understatement of all time…