Após a apresentação dos traços fundamentais da teoria do sociólogo alemão Niklas Luhmann (1927-1998) publica-se um texto do próprio Luhmann, em que suas concepções encontram uma formulação sintética.
After a presentation of the basic features of the theory of the German sociologist Niklas Luhmann (1927-1998) a text by Luhmann himself with a synthetic expression of his conceptions is published.
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