tural system.
             The basic unit of the social system is role interaction. Parsons explains the social system best in The Social System (Parsons, 1951)
             ...a social system consists in a plurality of individual actors interacting with each other in a situation which has at least a physical or environmental aspect, actors who are motivated in terms of a tendency to the "optimization of gratification" and whose relation to their situations, including each other, is defined and mediated in terms of a system of culturally structured and shared symbols.
             The normative standards in Parsons' theory of action are often determined by the social system. The normative expectations are learned in the social system.
             The basic unit of the personality system is the individual. The personality system focuses on individual needs, motives and attitudes, including 'motivation to gratification.' Finally the behavioral organism systems basic uni
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