Richard Dawkins: books: Climbing Mount Improbable
The metaphor of Mount Improbable represents this combination of perfection and improbability, which is epitomized in the seemingly "designed" perfection of living things. Dawkins skillfully guides the reader on a breathtaking journey through the mountain's passes and up its many peaks to demonstrate that following the improbable path to perfection takes time. Evocative illustrations accompany Dawkins's eloquent descriptions of natural perfections such as the teeming populations of figs, the intricate silken world of spiders, and the evolution of wings on the bodies of flightless animals. And through it all runs the thread of DNA, the molecule of life, responsible for its own destiny on an unending pilgrimage through time. Climbing Mount Improbable is a book of great impact and skill, written by the most prominent Darwinian of our age.
The towering cliffs of mount improbable can never, it seems, be climbed. In Richard Dawkins remarkable new book, the heights of mount improbable represent the combination of perfection and improbability that is epitomized in the seemingly 'designed' perfection of living things. From the combination of strength and sensitivity of an elephant's trunk to the life-saving camouflage of an ant-mimicking beetle, the living world is populated by creatures that seem miraculously designed fro the lives they lead. But these complex and brilliantly effective features cannot have come about by undirected chance. That would be equivalent to scaling the sheer face of the mountain in a single leap. The only way to explain seemingly designed objects is by slow, gradual evolution - inching cumulatively, almost infinitely slowly by the standards of human history, up the gently paths on the far side of Mount Improbable. Richard Dawkins guides the reader through the spectacular mountain passes of the natural world. We are led through the silken world of spiders; we are shown how wings gradually sprouted on the bodies of flightless animals; we see how a fig is a garden for its own teeming population of insects; and we learn how the eye has evolved no less than forty times independently. And through all of it runs the thread of DNA, the molecule of life, responsible for its own destiny on an unending pilgrimage through geological time. In The Selfish Gene, The Blind Watchmaker and River out of Eden Richard Dawkins revealed both the glorious variety and the underlying unity of life on earth. Here, once again, in writing of elegance and erudition, he inspires the reader with his contagious passion for the endless variety and adaptability of the gene and all its works.
A beautiful, barnstorming, thunderclap of a book' - Mail on Sunday A cracking good book on evolution' - John Gribbin in the Times Educational Supplement Mount Improbable ... is Dawkins's metaphor for natural selection: its peaks standing for evolution's most complex achievements: the human brain, the squid's eye, and the albatross's aeronautical prowess ... exhilarating - a perfect, elegant riposte to a great deal of fuzzy thinking about natural selection and evolution' - Robin Mackie in the Observer One of the most gifted storytellers of our generation ... he is a missionary who writes like an angel. He is to Darwinism what Saint Paul is to Christianity' - Mike Maran in Scotland on Sunday The parables - rivetting biological narratives, enthralling as the Arabian Nights tales - continue to ring the changes. Yet the central message - that DNA transcends the significance of the organism - remains the same ... organisms are merely vehicles for genes ... This is vintage Dawkins' - John Cornwell in the New Scientist An elegant series of lectures on Darwinian selection ... Dawkins continues a tradition of scientific writing from Galileo to Darwin' - Ian Thomson in the Daily Telegraph Dawkins has done more than anyone else now writing to make evolutionary biology comprehensible and acceptable' - John Maynard Smith in the Sunday Times
Excerpts from Chapter 3 - Message from the Mountain Mount Improbable rears up from the plain, lofting its peaks dizzily to the rarefied sky. The towering, vertical cliffs of Mount Improbable can never, it seems, be climbed Dwarfed like insects, thwarted mountaineers crawl and scrabble along the foot, gazing hopelessly at the sheer, unattainable heights. They shake their tiny, baffled heads and declare the brooding summit forever unscalable. Our mountaineers are too ambitious. So intent are they on the perpendicular drama of the cliffs, they do not think to look round the other side of the mountain. There they would find not vertical cliffs and echoing canyons but gently inclined grassy meadows, graded steadily and easily towards the distant uplands. Occasionally the gradual ascent is punctuated by a small, rocky crag, but you can usually find a detour that is not too steep for a fit hill-walker in stout shoes and with time to spare. The sheer height of the peak doesn't matter, so long as you don't try to scale it in a single bound. Locate the mildly sloping path and, if you have unlimited time, the ascent is only as formidable as the next step. The story of Mount Improbable is, of course, a parable. We shall explore its meaning in this and the next chapters.
This is another way of saying that objects such as these cannot be explained as coming into existence by chance. As we have seen, to invoke chance, on its own, as an explanation, is equivalent to vaulting from the bottom to the top of Mount Improbable's steepest cliff in one bound. And what corresponds to inching up the kindly, grassy slopes on the other side of the mountain? It is the slow, cumulative, one-step-at-a-time, non-random survival of random variants that Darwin called natural selection. The metaphor of Mount Improbable dramatizes the mistake of the sceptics quoted at the beginning of this chapter. Where they went wrong was to keep their eyes fixed on the vertical precipice and its dramatic height. They assumed that the sheer cliff was the only way up to the summit on which are perched eyes and protein molecules and other supremely improbable arrangements of parts. It was Darwin's great achievement to discover the gentle gradients winding up the other side of the mountain.
John Catalano |