The theory that is today the Model of Hierarchical Complexity was first pres­ented by Michael Lamport Commons and Francis Asbury Richards in the early 1980s. It builds directly upon the Piagetian model and the work of Kohlberg and can be consider­ed as neo-Piagetian (although some call it “post-Piagetian”), bec­ause it large­ly suppo­ses that the Piagetian model (with cogni­tive stages) is corr­ect, but that there are sev­eral stages above what a normal human adult achieves, high­er stages that only a minority of the adult popula­tion reach. According to the neo-Piagetians the study of these stages can ex­plain a lot about humanity and society.

What Is The Model of Hierarchical Complexity? – Metamoderna