The concept of interpenetration implies that, however important logical closure may be as a theoretical ideal, empirically social systems are conceived as open systems, engaged in complicate processes of interchange with environing systems (an outline of the social system). The environing systems are cultural, personality systems, the physical environment and the behaviour of the other subsystems. This idea also applies to social systems and their subsystems each of which is an open systems changing with the environing subsystems of a larger system. Parsons believes that society is a system that is bigger than the individual person and as we come and go, are born and then die society will always exist. Society will continue to grow and expand long after we are gone. The main function of society is using the balanced combination of mechanisms of the control in the course of the relation with five environments surrounding it, also a degree of internal integration (an outline of the social system). The three main concepts of Parsons’ society are the theory of action; this deals with the further development of society. Structural functionalism; this deals with the interaction between different parts of society and their functions. Finally, social order; this being the centre of society as a system. Parsons has a very systematic approach when analyzing society as a social system. He believes society consists of different aspects that make it a whole. But as a system society