Updated: 16 May 2021 The work of Clare W Graves (1970) and its Spiral Dynamics ‘build’  (Don Beck & Chris Cowan, 1996) theorise about motivational systems and their emergence. Where the emergent system reaches its nodal peak in matching the life conditions (internal and or external), this can be considered an ‘existential state’, level or stage. In the period Graves was constructing his concept from the results of his research, several other developmentalists were coming up with very similar theories and models. Unlike Graves who perceived ‘stages’ as merely markers in the processes of emergence, however, these other researchers tended to see development in more or less discreet stages which were distinct from each other. In spite of the limitations of these stage theories, the findings of their developers offer much additional insight into the characteristics of vMEMES, vMEME transition states and the workings of the Spiral. These additional insights are discussed in the pages on vMEMES. The purpose of these pages is to describe the basic structures of what are arguably the 3 most important stage models and to provide some background and critiquing of these theories. The Comparison Map places these and some other leading developmental models into a schematic… Read More