“Not only in research, but also in the everyday world of politics and economics, we would all be better off if more people realised that simple nonlinear systems do not necessarily possess simple dynamical properties.”
Simple mathematical models with very complicated dynamics (1976), Nature 261: 459--467
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Robert M. May 2
Australian scientist who has been Chief Scientific Adviser … 1936Related quotes
Source: Sociology and modern systems theory (1967), p. vii as cited in: cited in: Ludwig von Bertalanffy (1968) General System Theory. p. 7-8.
Kenneth Boulding (1986) "Proceedings of the 7th Friends Association for Higher Education Conference, Malone College, 1986" p. 4, quoted in Debora Hammond, The Science of Synthesis, Colorado: University of Colorado Press, 2003.
1980s

“Life was simple before World War II. After that, we had systems.”
The Wit and Wisdom of Grace Hopper (1987)
Source: 1970s, Ecodynamics: A New Theory Of Societal Evolution, 1978, p. 20
Do astronomical data contradict the existence of dynamically relevant cold or dark matter? (seminar talk at Columbia U. Astronomy Department), Pavel Kroupa, 16 Oct. 2014 http://www.astro.columbia.edu/event?eid=185,
Adam Przeworski and Fernando Limongi, The Journal of Economic Perspectives (Summer, 1993)

Cape Times (1 November 1989)
Parliament (1974-1991)
Source: http://www.samedia.uovs.ac.za/cgi-bin/getpdf?id=2201962