Society is a system.  However, "This usage ignores two important facts.  First, systems vary greatly in the degree of the interdependence and integration of their parts.  The constituent parts of human societies enjoy a measure of independence and autonomy which far exceeds that of the parts of most biological organisms or mechanical systems.  To ignore this is to invite confusion.  Second, there is no such thing as a perfect human social system in which the actions of the parts are completely subordinated to the needs of the whole.  This is a theoretical construct which has no counterpart or even remote approximation in the real world (1966, p.34).