Bigger than Chaos

Bigger than Chaos : Understanding Complexity through Probability

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Many complex systems--from immensely complicated ecosystems to minute assemblages of molecules--surprise us with their simple behavior. Consider, for instance, the snowflake, in which a great number of water molecules arrange themselves in patterns with six-way symmetry. How is it that molecules moving seemingly at random become organized according to the simple, six-fold rule? How do the comings, goings, meetings, and eatings of individual animals add up to the simple dynamics of ecosystem populations? More generally, how does complex and seemingly capricious microbehavior generate stable, predictable macrobehavior?

In this book, Michael Strevens aims to explain how simplicity can coexist with, indeed be caused by, the tangled interconnections between a complex system's many parts. At the center of Strevens's explanation is the notion of probability and, more particularly, probabilistic independence. By examining the foundations of statistical reasoning about complex systems such as gases, ecosystems, and certain social systems, Strevens provides an understanding of how simplicity emerges from complexity. Along the way, he draws lessons concerning the low-level explanation of high-level phenomena and the basis for introducing probabilistic concepts into physical theory.
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Product details

  • Paperback | 432 pages
  • 144 x 227 x 27mm | 557.92g
  • Cambridge, Mass, United States
  • English
  • 39 line illustrations
  • 0674022599
  • 9780674022591

Table of contents

Note to the Reader 1. The Simple Behavior of Complex Systems 1.1 Simplicity in Complex Systems 1.2 Enion Probability Analysis 1.3 Towards an Understanding of Enion Probabilities 2. The Physics of Complex Probability 2.1 Complex Probability Quantified 2.2 Microconstant Probability 2.3 The Interpretation of IC-Variable Distributions 2.4 Probabilistic Networks 2.5 Standard IC-Variables 2.6 Complex Probability and Probabilistic Laws 2.7 Effective and Critical IC-Values 2.A The Method of Arbitrary Functions 2.B More on the Tossed Coin 2.C Proofs 3. The Independence of Complex Probabilities 3.1 Stochastic Independence and Selection Rules 3.2 Probabilities of Composite Events 3.3 Causal Independence 3.4 Microconstancy and Independence 3.5 The Probabilistic Patterns Explained 3.6 Causally Coupled Experiments 3.7 Chains of Linked IC-Values 3.A Conditional Probability 3.B Proofs 4. The Simple Behavior of Complex Systems Explained 4.1 Representing Complex Systems 4.2 Enion Probabilities and Their Experiments 4.3 The Structure of Microdynamics 4.4 Microconstancy and Independence of Enion Probabilities 4.5 Independence of Microdynamic Probabilities 4.6 Aggregation of Enion Probabilities 4.7 Grand Conditions for Simple Macrolevel Behavior 4.8 Statistical Physics 4.9 Population Ecology 5. Implications for the Philosophy of the Higher-Level Sciences 5.1 Reduction 5.2 Higher-Level Laws 5.3 Causal Relevance 5.4 The Social Sciences 5.5 The Mathematics of Complex Systems 5.6 Are There Simple Probabilities? Notes Glossary References Index
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Review quote

In this ambitious reformulation of the probabilistic descriptions of stability (equilibrium, quasi-equilibrium, or quasi-determinate evolution) of collective systems, Strevens...has fairly rigorously defined a set of problems of micro state-macro state relations focusing on the inevitably 'simple behavior' of 'complex systems' that meet appropriate stochastic criteria. -- P. D. Skiff Choice 20040101 This book is a serious and ambitious effort to explain how complex systems can exhibit simple behaviour...There is much to be learned in reading [Strevens's] book. His attempt to solve the puzzle is serious and provocative. He raises interesting and important issues related to the central puzzle and provides insightful analyses of many of these issues. The work deserves the attention of the philosophical community, particularly those who are interested in the philosophical foundations of probability, physics, biology, or economics. -- Fred Kronz Metascience [Strevens] shows how, in the right hands at least, the mathematisation of population ecology does not need to obscure or ignore the underlying biology. Rather, the mathematics can be seen to represent the underlying biology in a systematic, simple, and natural way. -- Mark Colyvan Biology and Philosophy
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About Michael Strevens

Michael Strevens is Professor of Philosophy at New York University. He received a Guggenheim Fellowship in 2017.
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