Scientists have always attempted to explain the world in terms of a few unifying principles. In the fifth century B.C. Democritus boldly claimed that reality is simply a collection of indivisible and eternal parts or atoms. Over the centuries his doctrine has remained a landmark, and much progress in physics is due to its distinction between subjective perception and objective reality. This book discusses theory reduction in physics, which states that the whole is nothing more than the sum of its parts: the properties of things are directly determined by their constituent parts. Reductionism deals with the relation between different theories that address different levels of reality, and uses extrapolations to apply that relation in different sciences. Reality shows a complex structure of connections, and the dream of a unified interpretation of all phenomena in several simple laws continues to attract anyone with genuine philosophical and scientific interests. If the most radical reductionist point of view is correct, the relationship between disciplines is strictly inclusive: chemistry becomes physics, biology becomes chemistry, and so on. Eventually, only one science, indeed just a single theory, would survive, with all others merging in the Theory of Everything. Is the current coexistence of different sciences a mere historical venture which will end when the Theory of Everything has been established? Can there be a unified description of nature? Rather than an analysis of full reductionism, this book focuses on aspects of theory reduction in physics and stimulates reflection on related questions: is there any evidence of actual reduction? Are the examples used in the philosophy of science too simplistic? What has been endangered by the search for (the) ultimate truth? Has the dream of reductionist reason created any monsters? Is big science one such monster? What is the point of embedding science Y within science X, if predictions cannot be made on that basis?

Is the world nothing but matter pushing matter in a void? Are humans nothing but soulless machines for the survival of genes? Is the mind nothing but the brain? Is all science reducible to physics? Must scientists restrict the substance and structure of reality to physical forces? Does society consist merely of individuals or are holistic forces also at work? Is God really no more than a projection of nature, society, or our psyche? Or in each case do new realities emerge that cannot be reduced? Virtually every scholarly and popular book and magazine article on the mind, science, or religion touches on these issues of reductionism. But for all the interest in the topic, no in-depth introduction of the subject exists. The objective of this philosophical work is to fill that void. This book attempts to provide one common framework for studying how the issue of reduction versus emergence arises in each of the areas in which it comes up - the natural sciences, philosophy of mind, the social sciences, and religion. It tries to resolve some of the disputes by a new analysis: differentiating five types of reductionism and antireductionism - ontological, structural, theoretical, conceptual, and methodological. To help clarify the issues, a brief history of how reductionism and emergentism have developed in Western philosophy is also presented. By distinguishing different types of reductionism and by examining the issues in all the areas of philosophical interest collectively rather than limiting the discussion to just one area, the general issues surrounding reduction versus emergence become clearer. This approach brings together many of the most interesting questions today in philosophy, science, and religious studies. The attempt throughout the work is to present the reductionists' and emergentists' strongest case on each issue and to identify problems with both sides. But it is argued that in the end the reductionists in each area currently have the weaker position. The work concludes with a discussion of the centrality of nonreducible features in reality and asks whether science under a reductionist vision can ever explain the emergence of higher levels of phenomena.

Reductionism's approach brings together many of the most interesting questions today in philosophy (consciousness and computers) and in science (issues of complexity and self-organization). It also presents a brief history of how reductionism has developed in Western philosophy and religion, with reference to Indian philosophy on certain issues.

An extraordinary and challenging synthesis of ideas uniting Quantum Theory, and the theories of Computation, Knowledge and Evolution, Deutsch's extraordinary book explores the deep connections between these strands which reveal the fabric of realityin which human actions and ideas play essential roles.

In Untying the Gordian Knot: Process, Reality, and Context, Timothy E. Eastman proposes a new creative synthesis, the Logoi framework—which is radically inclusive and incorporates both actuality and potentiality—to show how the fundamental notions of process, logic, and relations, woven with triads of input-output-context and quantum logical distinctions, can resolve a baker’s dozen of age-old philosophic problems. Further, Eastman leverages a century of advances in quantum physics and the Relational Realism interpretation pioneered by Michael Epperson and Elias Zafiris and augmented by the independent research of Ruth Kastner and Hans Primas to resolve long-standing issues in understanding quantum physics. Adding to this, Eastman makes use of advances in information and complex systems, semiotics, and process philosophy to show how multiple levels of context, combined with relations—including potential relations—both local and local-global, can provide a grounding for causation, emergence, and physical law. Finally, the Logoi framework goes beyond standard ways of knowing—that of context independence (science) and context focus (arts, humanities)—to demonstrate the inevitable role of ultimate context (meaning, spiritual dimension) as part of a transformative ecological vision, which is urgently needed in these times of human and environmental crises.

The modern materialist approach to life has conspicuously failed to explain such central mind-related features of our world as consciousness, intentionality, meaning, and value. This failure to account for something so integral to nature as mind, argues philosopher Thomas Nagel, is a major problem, threatening to unravel the entire naturalistic world picture, extending to biology, evolutionary theory, and cosmology. Since minds are features of biological systems that have developed through evolution, the standard materialist version of evolutionary biology is fundamentally incomplete. And the cosmological history that led to the origin of life and the coming into existence of the conditions for evolution cannot be a merely materialist history, either. An adequate conception of nature would have to explain the appearance in the universe of materially irreducible conscious minds, as such. Nagel's skepticism is not based on religious belief or on a belief in any definite alternative. In Mind and Cosmos, he does suggest that if the materialist account is wrong, then principles of a different kind may also be at work in the history of nature, principles of the growth of order that are in their logical form teleological rather than mechanistic. In spite of the great achievements of the physical sciences, reductive materialism is a world view ripe for displacement. Nagel shows that to recognize its limits is the first step in looking for alternatives, or at least in being open to their possibility.

Over the last several decades, the theories of emergence and downward causation have become arguably the most popular conceptual tools in scientific and philosophical attempts to explain the nature and character of global organization observed in various biological phenomena, from individual cell organization to ecological systems. The theory of emergence acknowledges the reality of layered strata or levels of systems, which are consequences of the appearance of an interacting range of novel qualities. A closer analysis of emergentism, however, reveals a number of philosophical problems facing this theory. In Emergence, Mariusz Tabaczek offers a thorough analysis of these problems and a constructive proposal of a new metaphysical foundation for both the classic downward causation-based and the new dynamical depth accounts of emergence theory, developed by Terrence Deacon. Tabaczek suggests ways in which both theoretical models of emergentism can be grounded in the classical and the new (dispositionalist) versions of Aristotelianism. This book will have an eager audience in metaphysicians working both in the analytic and the Thomistic traditions, as well as philosophers of science and biology interested in emergence theory and causation.