niklas luhmannlasse gerritssylvia walbyleslie mccallh t odumedgar morinniklas luhmann emergence barry wellman humberto maturana Epstein and Axtell benoit mandelbrot paul cilliers systems science sociocybernetics complexity and philosophy mitchell feigenbaum autopoiesis patricia hill collins albert-laszlo barabasi warren mcculloch mitchell feigenbaum ecological systems theory self-organization Ilya Progogine erich jantsch francisco parra-luna duncan watts Tien Yien Li john von neumann ecological systems theory christopher langton mark granovetter John Holland John Holland neural networks sociocybernetics agent based modeling mitchell feigenbaum emma uprichard john conway new science of networks Geoffrey West mitchell feigenbaum Epstein and Axtell data mining cybernetics jenks and smith qualitative complexity fuzzy logic stephen wolfram bart kosko katia scyara genetic algorithms lotfi zadeh james yorke bart kosko Complexity in Health & Infrastructure robert axelrod warren weaver fractal geometry neural networks christopher langton jenks and smith qualitative complexity fractal geometry complexity science multi-agent modeling michael wooldridge self-organization walter pitts humberto maturana teuvo kohonen Per Bak Kurt Richardson artificial life john urry John Holland complexity and philosophy edward lorenz power laws system dynamics steve strogatz self-organization mark granovetter complexity and philosophy mitchell feigenbaum Stuart Kauffman chaos theory frank rosenblatt cellular automata nigel gilbert ecological systems theory nicholas christakis dynamical systems theory