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The Life of the Cosmos / by Lee Smolin

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The Life of the Cosmos / by Lee Smolin THE LIFE of the COSMOS Lee Smolin THE LIFE of the COSMOS OXFORD UNIVERSITY PRESS New York Oxfor d Oxford University Press Oxford New York Athens Auckland Bangkok Bogota Buenos Aires Calcutta Cape Town Chennai Dar es Salaam Delhi Florence Hong Kong Istanbul Karachi Kuala Lumpur Madrid Melbourne Mexico City Mumbai Nairobi Paris Sao Paulo Singapore Taipei Tokyo Toronto Warsaw and associated companies in Berlin Ibadan Copyright © 1997 by Lee Smolin First published by Oxford University Press, Inc., 1997 First issued as an Oxford University Press paperback, 1998 Oxford is a registered trademark of Oxford University Press All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of Oxford University Press. Selection from "No Matter, Never Mind" copyright © 1974 Gary Snyder. Used by permission of New Directions Publishing Corporation. Selection from "Fireflies" reprinted with permission of Simon & Schuster from Fireflies by Rabindranath Tagore. Copyright © 1928 by Macmillan Publishing Company, renewed, 1956 by Rabindrath Tagore. Selection from Dialogue, Concerning the. Two Chief World Systems by Galileo Galilei copyright Regent of the University of California Press. Selection from The. Blind Watchmaker by Richard Dawkins copyright ©1987. Selection from The Monadology of Leilmiz, translated by Roger Ariew and Daniel Garber, in G.W. Leibniz, Hackett Publishing, copyright© 1989. Selection from The, Statesman, by Plato, translated by J.B. Skemp, copyright 1992, Hackett Publishing. Selection from interview with His Holiness the Dalai Lama reprinted from Parabola, Volume xv, No. 1, spring 1990. Library of Congress Cataloging-in-Publication Data Smolin, Lee, 1995- The life of the cosmos / by Lee Smolin. p. cm. Includes bibliographical references and index. ISBN 0-19-510837-X ISBN 0-19-512664-5 (Pbk.) 1. Cosmology. I. Title QB981.S694 1996 523.1—dc20 96-27912 1 3 5 7 9 10 8 6 4 2 Printed in the United States of America on acid-free paper Dedicated to Laura Kuckes 1961-1990 Physician, playwright, friend, who inspired me to write this book. This page intentionally left blank Contents Prologue/Revolutions, 1 Introduction, 11 PART 1 The Crisis in Fundamental Physics 1. Light and Life, 23 2. The Logic of Atomism, 30 3. The Miracle of the Stars, 36 4. The Dream of Unification, 47 5. The Lessons of String Theory, 58 PART 2 An Ecology of Space and Time 6. Are the Laws of Physics Universal?, 75 7. Did the Universe Evolve?, 90 8. Detective Work, 107 9. The Ecology of the Galaxy, 116 10. Games and Galaxies, 129 PART 3 The Organization of the Cosmos 11. What is Life?, 141 12. The Cosmology of an Interesting Universe, 161 viii CONTENTS 13. The Flower and the Dodecahedron, 177 14. Philosophy, Religion, and Cosmology, 192 15. Beyond the Anthropic Principle, 202 PART 4 Einstein's Legacy 16. Space and Time in the New Cosmology, 213 17. The Road from Newton to Einstein, 222 18. The Meaning of Einstein's Theory of Relativity, 233 19. The Meaning of the Quantum, 240 PART 5 Einstein's Revenge 20. Cosmology and the Quantum, 257 21. A Pluralistic Universe, 267 22. The World as a Network of Relations, 276 23. The Evolution of Time, 285 Epilogue/Evolutions, 294 Appendix: Testing Cosmological Natural Selection, 301 Notes and Acknowledgments, 324 Selected Bibliography, 337 Glossary, 342 Index, 347 THE LIFE of the COSMOS This interconnection (or accommodation) of all created things to each other, brings it about that each simple substance has relations that express all the others, and consequently, that each simple substance is a perpetual, living mirror of the universe. Just as the same city viewed from different directions appears entirely different and, as it were, multiplied perspectively, in just the same way it happens that, because of the infinite multitude of simple substances, there are, as it were, just as many different universes, which are, nevertheless, only perspectives on a single one, . And this is the way of obtaining as much variety as possible, but with the greatest order possible, that is, it is the way of obtaining as much perfection as possible. —G. W. Leibniz, The Monadology, 56-58, 1714 Prologue/Revolutions s the story is told, Nicolaus Copernicus received the first copy of his first and Aonly book as he lay dying in the tower of the castle in northeastern Germany where he had lived and served as Deacon for the last half of his life. The book was titled Revolutions of the Spheres and it was, in time, to inspire such a radical shift of the world view of both the erudite and the ordinary that its title has since become our word for radical political and philosophical change. In this book, Copernicus expounded the astonishing idea that the Sun, and not the Earth, was at the center of the Universe, and that much of the mystery of the motions of the Sun, stars and planets could be explained by this simple hypothesis. The legend of Copernicus, and the revolution that followed, has served— more than any other episode—to define and explain science, its power and its role in European, and now world, civilization. Like most legends, it contains shades of truth, and shades of distortion and misinformation. For example, while it is true that Copernicus did delay publication of his book as long as he could, it is not true that he did this because of real, or imagined, fear of prosecution by the Catholic Church. The church, which was his sole employer during his life, had supported him in his work; even a Pope had expressed interest in these new ideas. 4 PROLOGUE It is more likely that this reluctant revolutionary was simply afraid of provoking controversy and public ridicule for advocating a view that went against both common sense and established science. Whatever the truth might be, what we can be certain that Copernicus would have been even more reluctant had he known how different a universe from the one he inhabited would arise from the revolutions of his book. For, apart from exchanging the role of the Sun and the Earth, most of the steps we associate with the shift in world view, which we call the Copernican Revolution, were not even mentioned in his book. For Copernicus, and even for Kepler and Galileo, the Uni- verse was finite and spherical. It was only large enough to contain the orbits of the six known planets, and the distant stars were lights affixed to the outer sphere that was its final boundary. There is no evidence that any of these, the main protago- nists of the revolution, ever doubted that the universe had been created six thou- sand years earlier by God, who waited and watched just outside of that stellar sphere. The more radical notions that led to our modern world view came after Copernicus. It was the mysterious monk turned mystic, Giordano Bruno, who proclaimed that space is infinite, that the stars are other suns, and that around them are other planets on which live other peoples. It was for these and other heresies, much more threatening to the authority of the church than the rather minor question of whether to reinterpret scripture to allow for the Earth's motion, that he was burned alive in the Campo dei Fiori in Rome in 1600. Coper- nicus also had no notion of the central ideas that, over the next century and a half, would shape a new view of the universe: that everything in the world, on the Earth and in the heavens, is made of atoms; and that all motion is governed by simple and universal laws. Indeed there is much more distance between the new picture of the universe as we find it finally synthesized in Newton's great book, the frindpia, and Copernicus's work published almost one hundred and fifty years earlier, than there was between Copernicus and his contemporaries. Copernicus started a revolution, but it is doubtful whether he would have approved of the result. A second great revolution in physics and cosmology was begun in the opening years of this century. It was launched with the introduction of relativity and quantum theory, each of which breaks decisively with the world view of Newton- ian physics. These two theories were put in final form in 1916 and 1926, respec- tively. However, in spite of the fact that the basic formulations of relativity and quantum theory have not been modified for more than sixty years, the revolu- tion in world view which they make necessary is not yet over. The reason for this is easy to see. The Aristotelian world view, which the Copernican revolution overthrew, described a single, unified theory of nature which could account for everything that happened, or might happen, in the universe then known to PROLOGUE 5 human beings. It explained what space and time are, what the shape of the cos- mos is, what it contains, and how and why change takes place. The Newtonian world view, which was the result of the Copernican revolution, was also a com- prehensive, unified theory, which applied to everything in the cosmos as it was then conceived. However, if the Newtonian world view has been overthrown in the 20th century, what has replaced it is not one new theory, but two. These two theories have been extremely successful in explaining both old and new phenom- ena, but neither of them can claim to be universal. The reason is, in each case, the existence of the other.
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