International Encyclopedia of Unified Science

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In 1938 a new series of publications started in the USA, the International Encyclopedia of Unified Science (IEUS). An ambitious project and never completed, it was devoted to unified science.

It was an output of the Vienna Circle to address the "growing concern throughout the world for the logic, the history, and the sociology of science..."[citation needed] Only the first section Foundations of the Unity of Science (FUS) was published; it contains two volumes for a total of nineteen monographs published from 1938 to 1969.

Volume I[edit]

Encyclopedia and Unified Science (FUS I-1)
Otto Neurath, Niels Bohr, John Dewey, Bertrand Russell, Rudolf Carnap, and Charles Morris

Foundations of the Theory of Signs (FUS I-2)
Charles Morris

Foundations of Logic and Mathematics (FUS I-3)
Rudolf Carnap

Linguistic Aspects of Science (FUS I-4)
Leonard Bloomfield

Procedures of Empirical Science (FUS I-5)
Victor F. Lenzen

Principles of the Theory of Probability (FUS I-6)
Ernest Nagel

Foundations of Physics (FUS I-7)
Philipp Frank

Cosmology (FUS I-8)
E. Finlay-Freundlich

Foundations of Biology (FUS I-9)
Felix Mainx

The Conceptual Framework of Psychology (FUS I-10)
Egon Brunswik

Volume II[edit]

Foundations of the Social Sciences (FUS II-1)
Otto Neurath

The Structure of Scientific Revolutions (FUS II-2)
Thomas S. Kuhn

Science and the Structure of Ethics (FUS II-3)
Abraham Edel

Theory of Valuation (FUS II-4)
John Dewey

The Technique of Theory Construction (FUS II-5)
Joseph H. Woodger

Methodology of Mathematical Economics and Econometrics (FUS II-6)
Gerhard Tintner

Concept Formation in Empirical Science (FUS II-7)
Carl G. Hempel

The Development of Rationalism and Empiricism (FUS II-8)
George De Santillana, Edgar Zilsel

The Development of Logical Empiricism (FUS II-9)
Joergen Joergensen

Bibliography and Index (FUS II-10)
Herbert Feigl, Charles Morris


Historian David Hollinger argued that the International Encyclopedia of Unified Science was a less comprehensive account of the sciences of the time than it could have been, and was especially weak in the social sciences.[1] Hollinger noted: "The Encyclopedia of the Social Sciences (12 vols., New York, 1933–1937) was a prodigious endeavor brought to successful completion by Alvin Johnson. This encyclopedia is a much more important episode in the history of thought than The International Encyclopedia of Unified Science yet has attracted much less attention from historians than the abortive enterprise led by Neurath."[1] Hollinger also said that the journal Philosophy of Science, founded in 1934, provided a much more inclusive perspective on the sciences in those years than did the International Encyclopedia of Unified Science.[1]

American political theorist James Burnham refers to the Encyclopedia in Science and Style: A Reply to Comrade Trotsky (1940), his penultimate tract discussing his differences with Trotsky and marking Burnham's renouncement of dialectical materialism. In this text he responds to Trotsky's request to draw his attention to "those works which should supplant the system of dialectic materialism for the proletariat" by referring to Principia Mathematica by Russell and Whitehead and "the scientists, mathematicians and logicians now cooperating in the new Encyclopedia of Unified Science".[2] Burnham resigned from the Workers Party three and a half months later declaring "that dialectical materialism, though scientifically meaningless, is psychologically and historically an integral part of Marxism" and that he had "for several years had no real place in a Marxist party."[3]

See also[edit]


  1. ^ a b c Hollinger 2011, pp. 216–217
  2. ^ Burhham J. (1940a) Science and Style: A Reply to Comrade Trotsky, in In Defence of Marxism by Leon Trotsky, London 1966, pp.232–256.
  3. ^ Burhham J. (1940b) "Resignation letter" (21 May 1940).

Further reading[edit]