“The existence of analogies between central features of various theories implies the existence of a general theory which underlies the particular theories and unifies them with respect to those central features. This fundamental principle of generalization by abstraction was enunicated by the eminent American mathematician E. H. Moore more than thirty years ago. It is the purpose of the pages that follow to work out its implication for theoretical and applied economics.”

— Paul A. Samuelson, book Foundations of Economic Analysis

Source: 1940s, Foundations of Economic Analysis, 1947, Ch. 1 : Introduction

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Paul A. Samuelson47

American economist 1915–2009

Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher

Source: General System Theory (1968), 2. The Meaning of General Systems Theory, p. 32

“Systems theory pursues the scientific exploration and understanding of systems that exist in the various realms of experience, in order to arrive at a general theory of systems: an organized expressing of sets of interrelated concepts and principles that apply to all systems.”

Béla H. Bánáthy (1919–2003) Hungarian linguist and systems scientist

Source: Systems Design of Education (1991), p. 31

“Ideas and techniques known in quantum electrodynamics have been applied to the Bardeen-Cooper-Schrieffer theory of superconductivity. In an approximation which corresponds to a generalization of the Hartree-Fock fields, one can write down an integral equation defining the self-energy of an electron in an electron gas with phonon and Coulomb interaction. The form of the equation implies the existence of a particular solution which does not follow from perturbation theory, and which leads to the energy gap equation and the quasi-particle picture analogous to Bogolyubov's.”

Yoichiro Nambu (1921–2015) American physicist

[Quasi-particles and gauge invariance in the theory of superconductivity, Physical Review, 117, 3, February 1960, 648–663, 10.1103/PhysRev.117.648]

“Theory in the social sciences should have three major functions. First, it should aid in the codification of our existing concrete knowledge. It can do so by providing generalized hypotheses for the systematic reformulation of existing facts and insights, by extending the range of implication of particular hypotheses, and by unifying discrete observations under general concepts. Through codification, general theory in the social sciences will help to promote the process of cumulative growth of our knowledge. In making us more aware of the interconnections among items of existing knowledge which are now available in a scattered, fragmentary form, it will help us fix our attention on the points where further work must be done.
Second, general theory in the social sciences should be a guide to research. By codification it enables us to locate and define more precisely the boundaries of our knowledge and of our ignorance. Codification facilitates the selection of problems, although it is not, of course, the only useful technique for the selection of problems for fruitful research. Further than this, general theory should provide hypotheses to be applied and tested by the investigation of these problems…
Third, general theory as a point of departure for specialized work in the social sciences will facilitate the control of the biases of observation and interpretation which are at present fostered by the departmentalization of education and research in the social sciences.”

Talcott Parsons (1902–1979) American sociologist

Source: Toward a general theory of action (1951), p. 3

“(a) There is a general tendency towards integration in the various sciences, natural and social. (b) Such integration seems to be centered in a general theory of systems. (c) Such theory may be an important means of aiming at exact theory in the nonphysical fields of science. (d) Developing unifying principles running "vertically" through the universe of the individual sciences, this theory brings us nearer to the goal of the unity of sciences. (e) This can lead to a much needed integration in scientific education.”

Ludwig von Bertalanffy (1901–1972) austrian biologist and philosopher

Variant: Mayor aims of general theory: (1) There is a general tendency toward integration in the various sciences, natural and social. (2) Such integration seems to be centered in a general theory of systems. (3) Such theory may be an important means for aiming at exact theory in the nonphysical fields of science. (4) Developing unifying principles running "vertically" through the universe of the individual sciences, this theory brings us nearer the goal of the unity of science. (5) This can lead to a much-needed integration in scientific education. Source: 1950s, "General systems theory," 1956, p. 38, cited in: Alexander Laszlo and Stanley Krippner (1992) " Systems Theories: Their Origins, Foundations, and Development http://archive.syntonyquest.org/elcTree/resourcesPDFs/SystemsTheory.pdf" In: J.S. Jordan (Ed.), Systems Theories and A Priori Aspects of Perception. Amsterdam: Elsevier Science, 1998. Ch. 3, pp. 47-74.

“A model that unifies all types of selection (chemical, sociological, genetical, and every other kind of selection) may open the way to develop a general ‘Mathematical Theory of Selection’ analogous to communication theory… Selection has been studied mainly in genetics, but of course there is much more to selection than just genetical selection… yet, despite the pervading importance of selection in science and life, there has been no abstraction and generalisation from genetical selection to obtain a general selection theory and general selection mathematics”

George R. Price (1922–1975) American population geneticist

Price, G.R. (1995). "The nature of selection." Journal of Theoretical Biology 175:389-396 (written circa 1971)

“The General Theory is at once both a book of economic theory and a font of economic prejudices—there are probably few academics in economics and political science who do not have an opinion of it, whether they have read it or not. It has reached the status—which it obtained almost immediately—where the fact of its existence is as important, if not more important, than what it actually says.”

Alan O. Ebenstein (1959) American political scientist, educator and author

Hayek's Journey: The Mind of Friedrich Hayek (2003)

“The central doctrine of Cartesian linguistics is that the general features of grammatical structure are common to all languages and reflect certain fundamental properties of the mind.”

Noam Chomsky (1928) american linguist, philosopher and activist

"Acquisition and use of language"
Quotes 2000s, 2007-09, (3rd ed., 2009)

“No matter how abstractly formulated are a general theory of systems, a general theory of evolution and a general theory of communication, all three theoretical components are necessary for the specifically sociological theory of society. They are mutually interdependent.”

Niklas Luhmann (1927–1998) German sociologist, administration expert, and social systems theorist

Luhmann (1982) The Differentiation of Society, Translated by Stephen Holmes and Charles Larmore. Columbia University Press, New York, 1982, pp. 261. Cited in: Loet Leydesdorff (2000) " Luhmann, Habermas, and the Theory of Communication http://www.leydesdorff.net/montreal.htm".

“Certainly, there is no general principle that prevents the creation of an economic theory based on other hypotheses than that of rationality.”

Kenneth Arrow (1921–2017) American economist

1970s-1980s, "Rationality of Self and Others in an Economic System", 1986

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Paul A. Samuelson47

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