The AGIL paradigm is a sociological scheme created by American sociologist Talcott Parsons in the 1950s. It is a systematic depiction of certain societal functions, which every society must meet to be able to maintain stable social life. The AGIL paradigm is part of Parsons's larger action theory, outlined in his notable book The Structure of Social Action, in The Social System and in later works, which aims to construct a unified map of all action systems, and ultimately "living systems". Indeed, the actual AGIL system only appeared in its first elaborate form in 1956, and Parsons extended the system in various layers of complexity during the rest of his intellectual life. Towards the end of his life, he added a new dimension to the action system, which he called the paradigm of the human condition; within that paradigm, the action system occupied the integral dimension.