Hierarchiology
Along with the Peter Principle, Dr. Peter also coined "hierarchiology" as the social science concerned with the basic principles of hierarchically organized systems in the human society.
Having formulated the Principle, I discovered that I had inadvertently founded a new science, hierarchiology, the study of hierarchies. The term hierarchy was originally used to describe the system of church government by priests graded into ranks. The contemporary meaning includes any organization whose members or employees are arranged in order of rank, grade or class. Hierarchiology, although a relatively recent discipline, appears to have great applicability to the fields of public and private administration. —Dr. Laurence J. Peter and Raymond Hull, The Peter Principle: Why Things Always Go WrongRead more about this topic: Peter Principle