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Interpv3issue1 11/21 (Page 1) Volume 30 Issue 1 Fall 2002 3 Howard Moltz Story and Plot in the Book of Judges 21 John S. Treantafelles On the Teachability of Virtue: Political Philosophy’s Paradox 49 Steven V. Hicks Regionalism, Globalism and the Prospects for World Order: A Hegelian Approach 79 Heinrich Meier What is Political Theology? 93 Jacob Howland Love of Wisdom and Will to Order in Plato’s Timaeus: On Peter Kalkavage’s Translation 107 Alex Harvey A Review of Stephen Wolfram’s A New Kind of Science Editor-in-Chief Hilail Gildin, Dept. of Philosophy, Queens College General Editors Seth G. Benardete (d. 2001) • Charles E. Butterworth • Hilail Gildin • Leonard Grey • Robert Horwitz (d. 1978) • Howard B. White (d. 1974) Consulting Editors Christopher Bruell • Joseph Cropsey • Ernest L. Fortin • John Hallowell (d. 1992) • Harry V. Jaffa • David Lowenthal • Muhsin Mahdi • Harvey C. Mansfield • Arnaldo Momigliano (d. 1987) • Michaeal Oakeshott (d. 1990) • Ellis Sandoz • Leo Strauss (d. 1973) • Kenneth W. Thompson International Editors Terrence E. Marshall • Heinrich Meier Editors Wayne Ambler • Maurice Auerbach • Fred Baumann • Amy Bonnette • Patrick Coby • Elizabeth C’ de Baca Eastman • Thomas S. Engeman • Edward J. Erler • Maureen Feder-Marcus • Pamela K. Jensen • Ken Masugi • Will Morrisey • Susan Orr • Charles T. Rubin • Leslie G. Rubin • Susan Meld Shell • Bradford P. Wilson • Martin D. Yaffe • Michael P. Zuckert • Catherine H. Zuckert Copy Editor Ellen Wilson Designer Wendy Coy Subscriptions Subscription rates per volume (3 issues): Individuals $29 Libraries and all other institutions $48 Students (four year limit) $18 Single copies available. Postage outside U.S.: Canada: add $4.50; all other countries add $5.40 for surface mail (8 weeks or longer) or $11 for airmail. Payments: in U.S. dollars and payable by a financial institution located within the U.S.A. (or the U.S. Postal Service). Inquiries Mrs. Mary Contos, Assistant to the Editor Interpretation, Queens College, Flushing N.Y. 11367-1597, U.S.A. (718) 997-5542 Fax: (718) 997-5565 email [email protected] Printed by Sheridan Press, Hanover, PA, U.S.A. A New Science? 107 A New Science? A LEX H ARVEY EMERITUS,QUEENS COLLEGE A New Kind of Science, Stephen Wolfram (Wolfram Media, Champaign, IL), ISBN 1-57955-008-8. 1197 pp., $44.95. Dr. Wolfram’s credentials and accomplishments are impres- sive. He was educated at Eton, Oxford, and Caltech where he took a PhD in theoretical physics at the age of 20. He was the creator of Mathematica,a widely used, powerful, symbolic algebra software package for the personal computer and then founded a very successful company to market the package. Most of his work since has been devoted to further development of Mathematica and other aspects of computer science particularly with respect to complexity, cellular automata and related matters. And, in 1981, he was the youngest recipient ever of a MacArthur award. A New Kind of Science starts with the stunning claim, “Three centuries ago science was transformed by the dramatic new idea that rules based on mathematical equations could be used to describe the natural world. My purpose in this book is to introduce a new kind of science based on the much more general types of rules that can be embodied in a simple computer program.” The new kind of science is described as “... one of the more impor- tant single discoveries in the whole history of the physical sciences”. Dr. Wolfram proposes to dispense entirely with the commonly accepted scheme of a system of laws expressible in systems of equations governing the behavior of various aspects of the physical universe from the infinitesimal to the cosmo- logical in favor of computer algorithms. This is a very large claim. Master 108 Interpretation Galileo said that the language of nature is mathematics; Dr. Wolfram says it is a computer program based on cellular automata. Were it not for Dr. Wolfram’s credentials the book would probably be widely ignored. As it is, it will be wide- ly read by computer scientists and other interested professionals. The systems of equations which Dr. Wolfram proposes to supersede are usually written in the language of calculus. They are so written because the variables with which physicists deal, such as length, time, electric fields, etc., are all believed to vary smoothly. Time does not move by discrete increments; space is not a discrete lattice. The natural language for discussing such variables is the calculus which is based on the concept of continuity;every- thing varies smoothly. There have, however, been formulations based on the hypothesis that space and time are in fact discrete. For these schemes the cal- culus is not suitable. This hypothesis has not as yet proven to be fruitful. Calculus remains the essential tool. Motivated in part by his discovery that very simple computer programs involving cellular automata can lead to results of remarkable com- plexity, Dr. Wolfram proposes that such structures as the Maxwell equations which describe with admirable precision the dynamics of the electromagnetic field, the extremely successful theory of general relativity descriptive of the classical gravitational field, and the remarkably successful quantum theory all be replaced by computer programs using self-replicating cellular automata.It should be noted that the fractal set is another simple scheme that can lead to extremely elaborate results. Cellular automata are a species of algorithm—a recipe. To construct the simplest of these, take a sheet of graph paper and, in the top- most line, black out a single square or none at all. Each square in the next row, in accord with a specified rule, derives its character (black or white) from that of the triplet centered immediately above. This is then propagat- ed by the same rule into the third and successive rows. It is readily deter- mined that there are 256 distinct rules of the simple kind noted above. Most of them are not of interest; they lead to simple repetitive patterns. However, there are some rules which lead to extremely complex, seemingly random patterns. There are obviously a large variety of more complicated schemes, e.g., instead of just black and white, several colors might be used or several of the squares in the topmost row might be filled in. Obviously, a computer could be easily programmed to apply a given rule. In the “Notes” at the end A New Science? 109 of the book, Dr. Wolfram provides specific examples of such programs written in Mathematica. The concept of cellular automata was first put forward by John von Neumann in the 1940s to model in vastly simplified form, self- replicating biological systems, and has been the subject of continuous study since then. The ultimate aim here is to understand the manner in which a living organism depends on the self-replication of a finite amount of DNA, i.e., a finite amount of initial information. A New Kind of Science is a com- prehensive treatise on the behavior of cellular automata and is without peer. There is no treatment in the (existing substantial) literature which is simul- taneously so extensive and intensive. Much of the material is the product of Dr. Wolfram’s own research and has advanced tremendously our under- standing of cellular automata and related structures. Chapters 1 through 7 constitute the “treatise” on the prop- erties of cellular automata. Chapter 8 explores how a cellular automaton can exhibit the behavior of ordinary physical and biological systems such as crystal growth and the onset of turbulence in fluid flow. He shows how very complex structures can be generated by very simple rules and initial condi- tions. For instance, he can model, with startling accuracy, the growth of pat- terns resembling spiral sea shells, the forms of plants, and the coloration patterns in animals. Dr. Wolfram correctly states, “Any model is ultimately an idealization in which only certain aspects of a system are captured and others ignored....In most cases there have in the past never really been models that can even reproduce the most obvious feature of the behavior we see. So it is already major progress that the models I discuss yield pictures that even look roughly right.” This claim is definitely justified. All this is foundation for the subsequent chapters. In “Fundamental Physics” (Chapter 9) Dr. Wolfram explores first the concept of “reversibility.” It is well known that at the microscopic level the equations for dynamical processes are reversible, i.e., if one changes the sign of the time variable, the equations still run without a hitch. That is, time can run either forward or backward. This, however is not true of macroscopic processes; all those we know are irreversible. They all run, time wise, in the same direction. Hence, the picturesque phrase: “The Arrow of Time”. Every living organism grows older, not younger. We remember yesterday much better than we remember tomorrow. 110 Interpretation In the section “The Nature of Space,” the second paragraph states, “Present day physics almost always assumes that space is a perfect con- tinuum.” “Almost always” does not give an accurate assessment. There is a growing view that at a sufficiently small scale, space exhibits the character of froth, and the smaller the scale the more pronounced the frothiness. This derives from well-founded opinion that the equations of general relativity should be quantized, as is the rest of physical theory, and, in such scheme, spacetime would be quantized and, at a sufficiently small scale, the Heisenberg uncertainty principle would manifest itself in frothiness. Dr. Wolfram then proceeds to discuss inter alia the conser- vation of energy, modeling the universe, the structure of space-time, elementary particles, quantum phenomena, and gravity in terms of computer algorithms.
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