As we approach this varied material it is wise to keep in mind the perspective of , First, let us consider the nature of the psychic self-system. While the early work on complex systems began with chemical and physical systems, attention has turned to the properties of complex biological systems. Details can be found in the after notes immediately following this chapter. This journey begins with an interpersonal perspective, proceeds to integrative attempts to blend drive theory and object relations, through the intersubjective viewpoint and brings us to the neurobiological position. Each focal system has its maturationally appropriate time of imprinting on the self-system, an imprinting that continues to exert influence throughout the self-system's life cycle. Schematically, this system can be represented as an inverted cone with developmental geographies occupying successive focal system areas of differentiated activity and expanded adaptive accommodation.