Before revision: Requisite Variety Self-organisation Social systems theory Viable system model Related fields and applications Cybernetics' central concept of circular causality is of wide applicability, leading to diverse applications and relations with other fields.
After revision: Variety and Requisite Variety Self-organisation Social systems theory Viable system model Related fields and applications Cybernetics' central concept of circular causality is of wide applicability, leading to diverse applications and relations with other fields.