2.10 Postwar Scientific Interdisciplinarity

Postwar scientific interdisciplinarity refers to the distinctive intellectual culture that emerged in American and European science in the late 1940s and 1950s, characterized by deliberate collaboration across traditional disciplinary boundaries. This culture—which represented a significant departure from the specialized, discipline-centered organization of prewar academic science—was both the context in which cybernetic communication theory was formulated and a consequence of the very discoveries that cybernetics produced.

The Wartime Roots of Interdisciplinarity

The interdisciplinary culture of postwar science was largely a product of wartime necessity. The problems of World War II—designing radar systems, cracking codes, guiding missiles, managing logistics, understanding human performance under stress—required contributions from physics, mathematics, engineering, psychology, physiology, and social science simultaneously. No single discipline possessed all the tools needed to address these problems.

The most consequential consequence of this forced integration was not technical but conceptual: working scientists discovered that insights from different disciplines were not merely complementary but structurally connected. The mathematics of statistical prediction that Norbert Wiener developed for antiaircraft fire control turned out to be formally identical to the mathematics needed to analyze feedback in biological nervous systems. The probability theory used in communication engineering turned out to be the same mathematics needed to analyze the information content of biological sequences. The formal equivalence was surprising and productive: it suggested that there were deep structural principles underlying apparently disparate phenomena.

Key Features of the Postwar Interdisciplinary Environment

Conference Culture and Cross-Disciplinary Dialogue

The postwar period saw the deliberate creation of institutional formats for cross-disciplinary exchange. The Macy Conferences on Cybernetics (1946–1953) are the most famous example: a series of ten conferences convened by the Josiah Macy Jr. Foundation that explicitly brought together scholars from mathematics, engineering, neuroscience, psychology, anthropology, and sociology to develop a shared conceptual framework.

The deliberate mixing of disciplines at the Macy Conferences was not merely organizational convenience but a methodological commitment: the organizers believed that progress on the hardest problems required perspectives that no single discipline could supply alone. Norbert Wiener, Warren McCulloch, Gregory Bateson, Margaret Mead, and other conference regulars were explicit that what they were trying to create was a new science that would transcend existing disciplinary boundaries.

This conference format became a model: the Society for General Systems Research (founded 1954), the Association for Computing Machinery (founded 1947), and dozens of new interdisciplinary journals and research institutes created institutionalized spaces for cross-disciplinary exchange.

The Unifying Power of Mathematics

One of the crucial enablers of postwar interdisciplinarity was the recognition that advanced mathematics—probability theory, linear algebra, differential equations, topology—provided a common language across disciplines. Mathematical formalization allowed insights developed in one domain to be transferred precisely to another without metaphorical imprecision.

Claude Shannon's use of probability theory to formalize information provided a single quantitative framework applicable to electrical engineering, neurophysiology, genetics, economics, and linguistics simultaneously. The Shannon entropy formula was the same formula regardless of whether the system generating symbols was a telephone transmitter, a neural population, a genetic sequence, or a natural language. This mathematical identity across domains made genuine interdisciplinary knowledge transfer possible.

Similarly, the systems-theoretic framework developed by Ludwig von Bertalanffy provided a formal language—inputs, outputs, feedback, homeostasis, equifinality—applicable to any organized system regardless of material composition. General systems theory offered a conceptual vocabulary that could be shared by biologists, sociologists, engineers, and economists without requiring each discipline to abandon its own specific methods and knowledge.

New Research Institutions

The postwar period saw the creation of new research institutions explicitly organized around interdisciplinary problems rather than traditional disciplines:

The RAND Corporation (1948): established as an independent research organization to do analysis and research for the US armed forces, RAND brought together mathematicians, economists, physicists, and social scientists to address defense policy problems. Systems analysis, operations research, and game theory were developed and applied at RAND in ways that crossed traditional disciplinary lines.

The Center for Advanced Study in the Behavioral Sciences (1954): funded by the Ford Foundation and located at Stanford, this residential fellowship program deliberately assembled scholars from economics, psychology, sociology, anthropology, and political science to develop cross-disciplinary behavioral science.

The MIT Research Laboratory of Electronics (1946): funded primarily by the Office of Naval Research, this laboratory housed physicists, engineers, mathematicians, and what would become cognitive scientists working on problems of communication, computation, and perception.

Bell Telephone Laboratories: the industrial research arm of the Bell System employed Claude Shannon, William Shockley (who invented the transistor), and dozens of other researchers working on problems at the intersection of physics, mathematics, and engineering. Bell Labs was the site of major contributions to information theory, communication theory, solid-state physics, and computing.

The Behavioral Sciences Initiative

A distinctive feature of postwar interdisciplinarity was the effort to create a unified behavioral science that would integrate psychology, sociology, anthropology, economics, and political science around a common set of formal methods. Funded substantially by the Ford Foundation in the early 1950s, this behavioral science initiative sought to apply quantitative methods—game theory, decision theory, mathematical sociology, experimental psychology—across the social and behavioral disciplines.

Cybernetics was positioned in this effort as providing the unifying framework: the concepts of feedback, information, and control could model behavioral phenomena at the individual, group, organizational, and societal levels. Wiener's own vision, expressed in The Human Use of Human Beings (1950), was explicitly social: a society organized around optimal information flow and humane feedback loops.

Key Intellectual Figures and Their Cross-Disciplinary Reach

The postwar interdisciplinary environment was carried by specific intellectual figures whose work crossed disciplinary boundaries:

Norbert Wiener moved between mathematics, engineering, neurophysiology, and social philosophy. His contributions to control theory, signal processing, information theory, and the philosophy of mind all drew on and contributed to multiple disciplines.

John von Neumann contributed foundational work in mathematics, quantum mechanics, game theory, numerical analysis, and computer architecture simultaneously. His collaboration with Wiener on the Macy Conferences, with Morgenstern on game theory, and with various engineering groups on computing all exemplified cross-disciplinary productivity.

Warren McCulloch and Walter Pitts brought together neurophysiology, logic, and mathematics to produce their 1943 paper "A Logical Calculus of the Ideas Immanent in Nervous Activity," which proposed that neural networks could compute any logical function—a result foundational to both neuroscience and computing theory.

Gregory Bateson moved from anthropology through psychology to ecology and communication theory, applying cybernetic concepts to schizophrenia, family communication, addiction, and ecological epistemology. Bateson's intellectual trajectory traced the conceptual spread of cybernetics from hard science into social and behavioral inquiry.

Margaret Mead brought anthropological perspectives to the Macy Conferences and helped ensure that the social science applications of cybernetics were taken seriously rather than marginalized in favor of purely technical developments.

Limits and Critiques

Postwar scientific interdisciplinarity was not without critics and limitations:

The unity of science problem: The aspiration to a single unified science underlying all disciplines—the cybernetic dream—encountered the reality that different phenomena require different levels and modes of explanation. The question of whether there really is a single formal framework that captures the relevant structure of both thermostats and families, of both telephone channels and political systems, remains unresolved.

Disciplinary resistance: Traditional academic disciplines did not simply dissolve in the face of interdisciplinary initiatives. Departmental structures, funding mechanisms, hiring practices, and publication venues all reinforced disciplinary boundaries. The interdisciplinary researchers often occupied marginal institutional positions—between departments, in new institutes without tenure lines—that created career vulnerabilities.

Loss of depth: Critics argued that interdisciplinary work often achieved breadth at the cost of depth: that cybernetic models of social phenomena were too abstract and formal to capture the specific mechanisms and dynamics that disciplinary specialists had worked to understand. The general concepts of feedback and information were accused of being so general as to be vacuous—able to describe everything and explain nothing.

Political distortions: The close relationship between postwar interdisciplinary science and military funding raised concerns about the direction of research. The systems analysis approach to social problems—developed at RAND and applied to Cold War strategy, social programs, and eventually the Vietnam War—was criticized for reducing complex political and ethical problems to technical optimization problems, obscuring questions of value and power.

Legacy for Cybernetic Communication Theory

The postwar interdisciplinary environment left several enduring marks on cybernetic communication theory:

• Its aspiration to apply the same formal framework (feedback, information, control) across all levels and domains of communication—from individual to organizational to societal.
• Its use of mathematical formalization as the gold standard of scientific rigor.
• Its tendency to see communication primarily as an information processing problem rather than a meaning-making or power-laden social practice.
• Its productive borrowing from engineering, biology, and mathematics, which gave communication theory more formal resources than it would have developed within a purely humanistic tradition.
• Its ongoing tension between the universalizing aspiration of systems theory and the particularizing demands of specific disciplinary knowledge.

Postwar scientific interdisciplinarity was both the intellectual environment that made cybernetic communication theory possible and the cultural aspiration that cybernetics sought to realize: a unified science of communication, control, and organization that would transcend the fragmentation of academic disciplines and address the organized complexity of modern life.