"... he went on to introduce a concept that essentially built on Simpson's 'compositionist' viewpoint and has become increasingly popular. This was his idea of 'emergence', the process whereby, in complex systems, the simple symmetry of elementary particles breaks down, and reductionism has to be replaced by what he preferred to call 'constructionism,' that there are in nature rules - laws - of complexity that, while they never break the laws of particle physics, add to them new laws of construction which are every bit as fundamental as the simpler laws governing electrons and protons, for example."

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ref	p432
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