The term autopoiesis (self-reproduction) is a key concept that has been adopted by modern sociological systems theory in explaining the self-constituting nature of social systems. In applying the autopoiesis concept to the legal system, law is analyzed as a communication system that reproduces itself in self-referential processes. Legal autopoiesis is a radicalized version of legal autonomy. It assumes that a process of hypercyclical self-constitution characterizes the evolution of the autopoietic legal system. In modern social systems theory, law forms part of the functionally differentiated society alongside other autopoietic function systems, like the economic, the political, or the religious system. Structural coupling shapes the relati...