Radical constructivism in the context of Giambattista Vico

Social reality refers to a socially constructed perspective of the world, consisting of the accepted social tenets of a community involving laws and social representations. It is distinct from the material reality, biological reality or individual cognitive reality, representing as it does on a subjective level created through social interaction and thereby transcending individual motives and actions. Radical constructivism would cautiously describe social reality as the product of uniformities among observers (whether or not including the current observer themselves).

Ernst von Glasersfeld (March 8, 1917, Munich – November 12, 2010, Leverett, Franklin County, Massachusetts) was a German philosopher, and emeritus professor of psychology at the University of Georgia, research associate at the Scientific Reasoning Research Institute, and adjunct professor in the Department of Psychology at the University of Massachusetts Amherst. He was a member of the board of trustees of the American Society for Cybernetics, from which he received the McCulloch Memorial Award in 1991. He was a member of the scientific board of the Instituto Piaget, Lisbon. Glasersfeld is known for the development of radical constructivism.

Second-order cybernetics, also known as the cybernetics of cybernetics, is the recursive application of cybernetics to itself and the reflexive practice of cybernetics according to such a critique. It is cybernetics where "the role of the observer is appreciated and acknowledged rather than disguised, as had become traditional in western science". Second-order cybernetics was developed between the late 1960s and mid 1970s by Heinz von Foerster and others, with key inspiration coming from Margaret Mead. Foerster referred to it as "the control of control and the communication of communication" and differentiated first-order cybernetics as "the cybernetics of observed systems" and second-order cybernetics as "the cybernetics of observing systems".

The concept of second-order cybernetics is closely allied to radical constructivism, which was developed around the same time by Ernst von Glasersfeld. While it is sometimes considered a break from the earlier concerns of cybernetics, there is much continuity with previous work and it can be thought of as a distinct tradition within cybernetics, with origins in issues evident during the Macy conferences in which cybernetics was initially developed. Its concerns include autonomy, epistemology, ethics, language, reflexivity, self-consistency, self-referentiality, and self-organizing capabilities of Complex Systems, such as in Complexity Theory (extenuating to the field of Complexity Economics). It has been characterised as cybernetics where "circularity is taken seriously".