Biological systems are dynamical, not easily predicted, and are creative in many ways... In the old equilibrium worldview, ideas about change were dominated by the action-reaction formula. It was a clockwork world, ultimately predictable in boring ways.

Langton in: Roger Lewin (1990) Complexity: Life at the Edge of Chaos New York, Macmillan. p. 190 as cited in: Sohail Inayatullah (1994) "Evolution and Complexity"