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| | NationMaster - Encyclopedia: Systems theory |
 | | Systems theory was founded by Ludwig von Bertalanffy, William Ross Ashby and others in the 1950s on principles from ontology, philosophy of science, physics, biology and engineering and later grew into numerous fields including geography, sociology, political science, organizational theory, management, psychotherapy (within family systems therapy) and economics among others. |
 | | Systems theory was founded by Ludwig von Bertalanffy, William Ross Ashby and others in the 1950s on principles from ontology, philosophy of science, physics, biology and engineering and later grew into numerous fields including sociology, political science, organizational theory, management, psychotherapy (within family systems therapy) and economics among others. |
 | | Modern systems theory was founded by Ludwig von Bertalanffy, William Ross Ashby and others between the 1940s and the 1970s on principles from philosophy, physics, biology and engineering and later grew into numerous fields including philosophy, sociology, organizational theory, management, psychotherapy (within family systems therapy) and economics among others. |
| www.nationmaster.com /encyclopedia/Systems-theory (4253 words) |
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