Psychoanalyst and philosopher Jon Mills has offered a number of substantial criticisms of the relational movement. Mills evidently thinks this "paradigm shift" to relational psychoanalysis is not exclusively due to theoretical differences with classical psychoanalysis but also arises from a certain group mentality and set of interests: "Relational psychoanalysis is an American phenomenon, with a politically powerful and advantageous group of members advocating for conceptual and technical reform" from a professional psychologist group perspective: "most identified relational analysts are psychologists, as are the founding professionals associated with initiating the relational movement".