Hannah Arendt/Karl Jaspers correspondence, 1926-1969

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Dėvid Doĭch

"A bold and all-embracing exploration of the nature and progress of knowledge from one of today's great thinkers. Throughout history, mankind has struggled to understand life's mysteries, from the mundane to the seemingly miraculous. In this important new book, David Deutsch, an award-winning pioneer in the field of quantum computation, argues that explanations have a fundamental place in the universe. They have unlimited scope and power to cause change, and the quest to improve them is the basic regulating principle not only of science but of all successful human endeavor. This stream of ever improving explanations has infinite reach, according to Deutsch: we are subject only to the laws of physics, and they impose no upper boundary to what we can eventually understand, control, and achieve. In his previous book, The Fabric of Reality, Deutsch describe the four deepest strands of existing knowledge-the theories of evolution, quantum physics, knowledge, and computation-arguing jointly they reveal a unified fabric of reality. In this new book, he applies that worldview to a wide range of issues and unsolved problems, from creativity and free will to the origin and future of the human species. Filled with startling new conclusions about human choice, optimism, scientific explanation, and the evolution of culture, The Beginning of Infinity is a groundbreaking book that will become a classic of its kind"--

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Patrick H. Samway

When he won the National Book Award in 1962 for his first novel, The Moviegoer, Walker Percy quickly established a wide and devoted following. Trained as a physician (who never practiced medicine after suffering from tuberculosis in the 1940s), Dr. Percy became a careful diagnostician of modern society in five subsequent novels and three non-fiction books. This biography, written with Percy's approval and assistance, allows his life to unfold as he lived it, with its unexpected twists and complexities. The tragic deaths of his father and mother, different in manner but close in time, were traumatic events for their teenage son. His subsequent adoption by "Uncle Will - William Alexander Percy, the noted writer and patrician - extended his cultural horizons. After his studies at the University of North Carolina at Chapel Hill and at Columbia University's School of Medicine, he married Mary Bernice Townsend. Patrick Samway's meticulous biography tracks their conversion to Roman Catholicism and Percy's dogged determination to continue his career as a novelist and semiotician in Covington, Louisiana.

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Steven F. Savitt

While it seems manifest in our experience that time flows - from the past to the present moment and into the future, there are a number of philosophical and physical objections to this commonsense view of dynamic time. In the quest to make sense of this conundrum philosophers and physicists confront fascinating and irresistible questions such as: Can effects precede causes? Can one travel in time? Can the expansion of the universe or the process of measurement in quantum mechanics provide a direction of time? In this book eleven eminent scholars, standing at the boundary between physics and philosophy, attempt to answer these questions in an entertaining yet rigorous way. For example, William Unruh's chapter is one of the first non-technical essays by this important cosmologist and Huw Price discusses critically the exciting cosmological views of Hawking and Penrose. Philip Stamp and Anthony Leggett discuss macroscopic quantum phenomena, a subject which has not been discussed much outside the specialist literature. John Earman's paper on time travel is likely to become one of the landmarks in the literature. The book will be enjoyed by anyone of a speculative turn of mind fascinated by the puzzles of time.

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Roger Penrose

A New York Times bestseller when it appeared in 1989, Roger Penrose's The Emperor's New Mind was universally hailed as a marvelous survey of modern physics as well as a brilliant reflection on the human mind, offering a new perspective on the scientific landscape and a visionary glimpse of the possible future of science. Now, in Shadows of the Mind, Penrose offers another exhilarating look at modern science as he mounts an even more powerful attack on artificial intelligence. But perhaps more important, in this volume he points the way to a new science, one that may eventually explain the physical basis of the human mind. Penrose contends that some aspects of the human mind lie beyond computation. This is not a religious argument (that the mind is something other than physical) nor is it based on the brain's vast complexity (the weather is immensely complex, says Penrose, but it is still a computable thing, at least in theory). Instead, he provides powerful arguments to support his conclusion that there is something in the conscious activity of the brain that transcends computation - and will find no explanation in terms of present-day science. To illuminate what he believes this "something" might be, and to suggest where a new physics must proceed so that we may understand it, Penrose cuts a wide swathe through modern science, providing penetrating looks at everything from Turing computability and Godel's incompleteness, via Schrodinger's Cat and the Elitzur-Vaidman bomb-testing problem, to detailed microbiology. Of particular interest is Penrose's extensive examination of quantum mechanics, which introduces some new ideas that differ markedly from those advanced in The Emperor's New Mind, especially concerning the mysterious interface where classical and quantum physics meet. But perhaps the most interesting wrinkle in Shadows of the Mind is Penrose's excursion into microbiology, where he examines cytoskeletons and microtubules, minute substructures lying deep within the brain's neurons. (He argues that microtubules - not neurons - may indeed be the basic units of the brain, which, if nothing else, would dramatically increase the brain's computational power.) Furthermore, he contends that in consciousness some kind of global quantum state must take place across large areas of the brain, and that it is within microtubules that these collective quantum effects are most likely to reside.