Niklas Luhmann (1927–1998) German sociologist, administration expert, and social systems theorist
Source: Art As a Social System (2000), p. 5 as cited by Andrew E. McNamara (2010) "Visual acuity is not what it seems : on Ian Burn's 'Late' reflections". In: Ann Stephen (Ed.) Mirror Mirror http://sydney.edu.au/museums/pdfs/Art_Gallery/mirror_mirror_catalogue.pdf.