1 In terms of practical application, the seminal works on systems and feedback loops include Industrial Dynamics, MIT Press, 1961; Urban Dynamics, MIT Press, 1969; and World Dynamics, MIT Press, 1970, by Jay W. Forrester.

2 See, for example, Why Things Bite Back: Technology and the Revenge of Unintended Consequences by Edward Tenner, Vintage Books, 1997.

3 See, for example, Macroscope: A New World Scientific System by Joel De Rosnay, translated by Robert Edwards, Harper & Row Publishers, 1979.

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