Dunbar 's conclusion was that most human brains can really understand only an average of 150 individuals as fully developed , complex people .
According to a study by Robin Dunbar at the University of Liverpool , primate brain size is determined by social group size .
Robin Dunbar 's conclusion was that most human brains can really understand only an average of 150 individuals as fully developed , complex people .
According to a study by Robin Dunbar at the University of Liverpool , primate brain size is determined by social group size .