Technological systems become organized by commands from outside, as when human intentions lead to the building of structures or machines. But many nat- ural systems become structured by their own internal processes: these are the self- organizing systems, and the emergence of order within them is a complex phe- nomenon that intrigues scientists from all disciplines. Unfortunately, complexity is ill-defined. Global explanatory constructs, such as cybernetics or general sys- tems theory, which were intended to cope with complexity, produced instead a grandiosity that has now, mercifully, run...