John Cornwell

Our lives, states of health, relationships, behavior, experiences of the natural world, and the technologies that shape our contemporary existence are subject to a superfluity of competing, multi-faceted and sometimes incompatible explanations. Widespread confusion about the nature of "explanation" and its scope and limits pervades popular exposition of the natural sciences, popular history and philosophy of science. This fascinating book explores the way explanations work, why they vary between disciplines, periods, and cultures, and whether they have any necessary boundaries. In other words, Explanations aims to achieve a better understanding of explanation, both within the sciences and the humanities. It features contributions from expert writers from a wide range of disciplines, including science, philosophy, mathematics, and social anthropology.

"A person is not explainable in molecular, field-theoretical, or physiological terms alone." With that declaration, Nobel laureate Gerald M. Edelman goes straight to the heart of Nature's Imagination, a vibrant and important collection of essays by some of the world's foremost scientists. Ever since the Enlightenment, the authors write, science has pursued reductionism: the idea that the whole can be understood by examining and explaining each of its parts. But as this book shows, scientists in every discipline are reaching for a new paradigm that accounts for the whole--from the individual person to the universe itself. Nature's Imagination gathers together the work of thirteen leading mathematicians, astronomers, neuroscientists, and philosophers, as they discuss the revolution sweeping the sciences. Here Roger Penrose, Oliver Sacks, John Barrow, Gregory Chaitin, Maragret Boden, and others explore how and why classic reductionism is falling by the wayside in their own fields. As Freeman Dyson writes in the introduction, science is an art form, not a philosophical method, and it is always in search of new tools. Reductionism has done its work, and scientists are in search of another. Roger Penrose offers a fascinating account of irreducibility in mathematics, starting with the example of an impossible triangle--a drawing of a triangular object twisted so that could not exist in three dimensions. He breaks the triangle into three parts, showing that each corner is physically possible; only in combination is the triangle impossible. Both Penrose and mathematician Gregory Chaitin explore Godel's incompleteness theorem--as does John Barrow, who explains that Chaitin's proof of the theorem shows that, if we ever arrive at a Theory of Everything, there may be a still deeper and simpler unifying theory beyond that. Other contributors discuss the changing thinking in neuroscience, and the limitations of a mechanical view of the mind: as Oliver Sacks writes, "if we are to have a model or theory of mind as this actually occurs in living creatures in the world, it may have to be radically different from anything like a computational one." In addition, this volume includes staunch defenders of the classic scientific approach, such as Peter Atkins ("The omnicompetence of science, and in particular the simplicity its reductionist insight reveals, should be accepted as a working hypothesis until, if ever, it is proved inadequate"). The advance of science has been so startlingly swift in the last century that it has begun to approach limits never dreamed of before. This remarkable volume captures the latest thinking on where we must turn if we are to truly understand oursevles and the universe we live in.

What processes of the brain or the mind can explain the uniquely personal experience we have of smelling a rose, or feeling the pain of toothache, or seeing the point of a newspaper cartoon, or sensing a pang of post-modernist angst in the run up to the Millenium. The phenomenon of humanhigher-order consciousness has puzzled philosophers, naturalists, and theologians down the ages. Now, somewhat belatedly, consciousness has caught the interest of scientists, some of whom believe they are on the brink of discovering its basis in neurobiological processes. This book, drawing together leading figures from the spheres of science and philosophy, is about the prospects of finding a scientific explanation of consciousness. And it is also about how our view of ourselves could be affected by such a scientific explanation. Until recently, the vast complexityof the brain had kept researchers from tackling the thorny topic of consciousness. But now, new imaging techniques are revealing many of the brain's mysteries to neuroscientists, while some researchers in the field of artificial intelligence believe they will be able to replicate consciousness withsilicon and circuitry. Meanwhile, philosophers continue to take issue with the methodology used by science to investigate this phenomenon. These are the issues that are debated in this book, in which exponenets of each view have the opportunity to argue their case, and the result is a collectionthat will both enlighten all those interested in the question of consciousness, and stimulate debate among those at the forefront of research in the many fields now investigating it.