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The early, now classic, papers of Howard Pattee are often difficult to find. This book makes these papers readily available and features a contemporary introduction which links them to current discourse in biosemiotics and the cognitive sciences.

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Howard Pattee is a physicist who for many years has taken his own path in studying the physics of symbols, which is now a foundation for biosemiotics. By extending von Neumann´s logical requirements for self-replication, to the physical requirements of symbolic instruction at the molecular level, he concludes that a form of quantum measurement is necessary for life. He explains why all non-dynamic symbolic and informational controls act as special (allosteric) constraints on dynamical systems. Pattee also points out that symbols do not exist in isolation but in coordinated symbol systems we call languages. Such insights turn out to be necessary to situate biosemiotics as an objective scientific endeavor.
By proposing a way to relate quiescent symbolic constraints to dynamics, Pattee´s work builds a bridge between physical, biological, and psychological models that are based on dynamical systems theory. Pattee´s work awakes new interest in cognitive scientists, where his recognition of the necessary separation-the epistemic cut-between the subject and object provides a basis for a complementary third way of relating the purely symbolic, computational models of cognition and the purely dynamic, non-representational models.
This selection of Pattee´s papers also addresses several other fields, including hierarchy theory, artificial life, self-organization, complexity theory, and the complementary epistemologies of the physical and biological sciences.

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Preface and Acknowledgments.- Introduction by Howard Pattee.- The Physical Basis of Coding and Reliability in Biological Evolution.- How Does a Molecule Become a Message?.- Physical Problems of Decision-Making Constraints.- Laws and constraints, symbols and languages.- The Physical Basis and Origin of Hierarchical Control.- Postscript: Unsolved Problems and Potential Applications of Hierarchy Theory.- Discrete and Continuous Processes in Computers and Brains.- The complementarity principle in biological and social structures.- Clues from Molecular Symbol Systems.- Cell Psychology: An Evolutionary Approach to the Symbol-Matter Problem.- Universal Principles of Measurement and Language Functions in Evolving Systems.- Instabilities and Information in Biological Self-organization.- Evolving Self-Reference: Matter, Symbols, and Semantic Closure.- Artificial Life Needs a Real Epistemology.- The Problem of Observables in Models of Biological Organizations.- Causation, Control, and the Evolution of Complexity.- The Necessity of Biosemiotics: Matter-Symbol Complementarity.- Afterword by Joanna Raczaszek-Leonardi

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