“A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over, beginning with a working simple system.”

—  John Gall

Source: General systemantics, an essay on how systems work, and especially how they fail..., 1975, p. 65, cited in: Grady Booch (1991) Object oriented design with applications. p. 11

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John Gall 13
American physician 1925–2014

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“A complex system that works is invariably found to have evolved from a simple system that worked. The inverse proposition also appears to be true: A complex system designed from scratch never works and cannot be made to work. You have to start over, beginning with a working simple system.”

John Gall (1925–2014) American physician

Source: General systemantics, an essay on how systems work, and especially how they fail..., 1975, p. 71. This statement is known as Gall's law

Kevin Kelly photo

“Complexity must be grown from simple systems that already work.”

Kevin Kelly (1952) American author and editor

Out of Control: The New Biology of Machines, Social Systems and the Economic World (1995)

“But how does it come about, step by step, that some complex Systems actually function? This question, to which we as students of General Systemantics attach the highest importance, has not yet yielded to intensive modern methods of investigation and analysis. As of this writing, only a limited and partial breakthrough can be reported, as follows: A COMPLEX SYSTEM THAT WORKS IS INVARIABLY FOUND TO HAVE EVOLVED FROM A SIMPLE SYSTEM THAT WORKED”

John Gall (1925–2014) American physician

Source: Systemantics: the underground text of systems lore, 1986, p. 65 cited in "Quotes from Systemantics – Funny, But Scary Too" Posted on agileadvice.com March 3, 2006 by Mishkin Berteig. This quote was mentioned in General systemantics (1975, p. 71)

Ai Weiwei photo

“I want to prove that the system is not working..... You can’t simply say that the system is not working. You have to work through it”

Ai Weiwei (1957) Chinese concept artist

Osnos, Evan. “ It’s Not Beautiful: An Artist Takes On the System http://www.newyorker.com/reporting/2010/05/24/100524fa_fact_osnos?currentPage=all.” New Yorker, May 24, 2010, 54–63.
2010-, 2010

“There is no over-arching theory of complexity that allows us to ignore the contingent aspects of complex systems. If something really is complex, it cannot by adequately described by means of a simple theory. Engaging with complexity entails engaging with specific complex systems. Despite this we can, at a very basic level, make general remarks concerning the conditions for complex behaviour and the dynamics of complex systems. Furthermore, I suggest that complex systems can be modelled.”

Paul Cilliers (1956–2011) South African philosopher

Source: Complexity and Postmodernism (1998), p. ix

“The classification of a system as complex or simple will depend upon the observer of the system and upon the purpose he has for considering the system.”

Mike Jackson (1951) systems scientist

As cited in: Joseph E. Kasser (2010) " Seven systems engineering myths and the corresponding realities http://www.synergio.nl/media/59286/7_myths_of_se.pdf"
Towards a System of Systems Methodologies (1984)

Ward Cunningham photo

“Over and over, people try to design systems that make tomorrow's work easy. But when tomorrow comes it turns out they didn't quite understand tomorrow's work, and they actually made it harder.”

Ward Cunningham (1949) American computer programmer who developed the first wiki

A Conversation with Ward Cunningham (2003), Working the Program

“The objective of the Computer-Aided Design Project is to evolve a machine systems which will permit the human designer and the computer to work together on creative design problems.”

Douglas T. Ross (1929–2007) American computer scientist

Source: Computer-Aided Design: A Statement of Objectives (1960), p. iii: Abstract.

“In complex systems cause and effect are often not closely related in either time or space. The structure of a complex system is not a simple feedback loop where one system state dominates the behavior. The complex system has a multiplicity of interacting feedback loops. Its internal rates of flow are controlled by nonlinear relationships. The complex system is of high order, meaning that there are many system states (or levels). It usually contains positive-feedback loops describing growth processes as well as negative, goal-seeking loops. In the complex system the cause of a difficulty may lie far back in time from the symptoms, or in a completely different and remote part of the system. In fact, causes are usually found, not in prior events, but in the structure and policies of the system.”

Jay Wright Forrester (1918–2016) American operations researcher

Source: Urban dynamics (1969), p. 9

Dorothy Day photo

“The absolutist begins a work, others take it up and try to spread it. Our problems stem from our acceptance of this filthy, rotten system.”

Dorothy Day (1897–1980) Social activist

As quoted in Women on War : Essential Voices for the Nuclear Age (1988), by Daniela Gioseffi, p. 103
Variant: A pebble cast into a pond causes ripples that spread in all directions. Each one of our thoughts, words and deeds is like that. No one has a right to sit down and feel hopeless. There's too much work to do.
As quoted in Singing the Living Tradition (1993) by the Unitarian Universalist Association, p. 560
Context: What I want to bring out is how a pebble cast into a pond causes ripples that spread in all directions. And each one of our thoughts, words and deeds is like that. Going to jail for distributing leaflets advocating war tax refusal causes a ripple of thought, of conscience among us all. And of remembrance too. …. There may be ever improving standards of living in the U. S., with every worker eventually owning his own home and driving his own car; but our modern economy is based on preparation for war. … The absolutist begins a work, others take it up and try to spread it. Our problems stem from our acceptance of this filthy, rotten system.

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