Abstract
Complex systems approaches are a new version of self-organizing systems theories. Heretofore, self-organizing systems approaches have laid stress on the self-stabilizing aspects of the systems. If we are forced to say, the traditional approaches have not developed their implication to study the dynamics of self-activating aspects which appear in the changing processes to the new adaptive structure of self-organizing systems. Complex systems approaches have hopeful capacity to study the self-activating aspects. If we form a hasty conclusion that we need not the "old systems theories", we shall make a fatal mistake. Considering the approach in the style of Gell-Mann, we have to utilize the both approaches;the approach to study self-stabilizing aspects and the approach to study self-activating aspects.
