“A system is a set of two or more elements that satisfies the following three conditions. (1) The behavior of each element has an effect on the behavior of the whole. (2) The behavior of the elements and their effects on the whole are interdependent. the way each element behaves and the way it affects the whole depends on how at least one other element behaves. (3) However subgroups of the elements are formed, each has an effect on the behavior of the whole and none has an independent effect on it.”

—  Russell L. Ackoff

Source: 1980s, Creating the Corporate Future, 1981, p. 15-16.

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Russell L. Ackoff 70
Scientist 1919–2009

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“A system can be defined as a set of elements standing in interrelations. Interrelation means that elements, p, stand in relations, R, so that the behavior of an element p in R is different from its behavior in another relation, R’. If the behaviors in R and R’ are not different, there is no interaction, and the elements behave independently with respect to the relations R and R’.”

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

Source: General System Theory (1968), 3. Some System Concepts in Elementary Mathematical Consideration, p. 55-56

“Each element in the system is ignorant of the behaviour of the system as a whole, it responds only to information that is available to it locally… If each element 'knew' what was happening to the system as a whole, all of the complexity would have to be present in that element.”

Paul Cilliers (1956–2011) South African philosopher

Source: Complexity and Postmodernism (1998), p. 4-5; as cited in: Peter Buirski, ‎Amanda Kottler (2007) New Developments in Self Psychology Practice http://books.google.nl/books?id=PinroXBLDkIC&pg=PA9, p. 9

“An organization comes into being when (1) there are persons able to communicate with each other (2) who are willing to contribute action (3) to accomplish a common purpose. The elements of an organization are therefore (1) communication; (2) willingness to serve; and (3) common purpose. These elements are necessary and sufficient conditions initially, and they are found in all such organizations. The third element, purpose, is implicit in the definition. Willingness to serve, and communication, and the interdependence of the three elements in general, and their mutual dependence in specifie cooperative systems, are matters of experience and observation.”

Chester Barnard book The Functions of the Executive

Source: The Functions of the Executive (1938), p. 82; Highlighted section cited among others in: Dennis K. Mumby (2012), Organizational Communication: A Critical Approach. p. 8

“Every organism represents a system, by which term we mean a complex of elements in mutual interaction. From this obvious statement the limitations of the analytical and summative conceptions must follow. First, it is impossible to resolve the phenomena of life completely into elementary units; for each individual part and each individual event depends not only on conditions within itself, but also to a greater or lesser extent on the conditions within the whole, or within superordinate units of which it is a part. Hence the behavior of an isolated part is, in general, different from its behavior within the context of the whole… Secondly, the actual whole shows properties that are absent from its isolated parts.”

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

As cited in: D.C. (1969) "Systems Theory — A Discredited Philosophy". in: Abacus V. p. 4
1950s, Problems of Life (1952, 1960)

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“The whole task of psychology can therefore be summed up in these two problems : (1) What are the elements of consciousness? (2) What combinations do these elements undergo and what laws govern these combinations?”

Wilhelm Wundt (1832–1920) German physician, physiologist, philosopher and professor

Source: An Introduction to Psychology (1912), p. 44; Cited in: Stephen Kosslyn. Image and Mind. 1980, p. 438

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“The tendency to be rational is the consistent and hence predictable element in human behavior.”

David D. Friedman (1945) American economist, physicist, legal scholar, and libertarian theorist

Source: Price Theory: An Intermediate Text, 1986, p.4

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“Systems thinking means the ability to see the synergy of the whole rather than just the separate elements of a system and to learn to reinforce or change whole system patterns. Many people have been trained to solve problems by breaking a complex system, such as an organization, into discrete parts and working to make each part perform as well as possible. However, the success of each piece does not add up to the success of the whole. to the success of the whole. In fact, sometimes changing one part to make it better actually makes the whole system function less effectively.”

Richard L. Daft (1964) American sociologist

Source: The Leadership Experience, 2008, p. 141.

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“When a mess, which is a system of problems, is taken apart, it loses its essential properties and so does each of its parts. The behavior of a mess depends more on how the treatment of its parts interact than how they act independently of each other. A partial solution to a whole system of problems is better than whole solutions of each of its parts taken separately.”

Russell L. Ackoff (1919–2009) Scientist

Cited in: Can Alpaslan, Ian Mitroff (2011) Swans, Swine, and Swindlers: Coping with the Growing Threat of Mega-Crises and Mega-Messes. p. 16.
1970s, The future of operational research is past, 1979

“If all of the elements in a large system are loosely coupled to one another, then any one element can adjust to and modify a local a local unique contingency without affecting the whole system. These local adaptations can be swift, relatively economical, and substantial.”

Karl E. Weick (1936) Organisational psychologist

Source: 1970s, "Educational organizations as loosely coupled systems," 1976, p. 7

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“Everything that has been created, the macrocosm as well as the microcosm, consequently the big and the small world have been achieved by the effect of the elements.”

Franz Bardon book Initiation Into Hermetics

Source: Initiation Into Hermetics (1956), p. 9

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