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In page Niklas Luhmann:

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Luhmann's systems theory is not without its critics; his definitions of "autopoietic" and "social system" differ from others. At the same time, his theory is being applied worldwide by sociologists and other scholars. It is often used in analyses dealing with corporate social responsibility, organisational legitimacy, governance structures as well as with sociology of law, and of course general sociology. His systems theory has also been used to study media discourse of various energy technologies throughout the US, including smart grids, carbon capture and storage, and wind energy,[citation needed] but also to highlight how diplomacy differs from politics as these two may pose two distinct systems with distinct functions and distinct media (peace and power, respectively).[1]