Example image of eyePlorer eyePlorer map for 'Dunbar's number': Interpersonal relationship Social group Neocortex Robin Dunbar United Kingdom Primate Primatology Social grooming Human Genus Anthropology Ethnography Hunter-gatherer Pleistocene Band society Tribe Nomad Subsistence agriculture War Language Evolutionary psychology Management Statistics Cohesion Social software Social network Peter Killworth Median Malcolm Gladwell The Tipping Point Anarchy Politics Tragedy of the commons Neotribalism Facebook Massively multiplayer online role-playing game MySpace Social network service Ultima Online Virtual community Website Sweden Neologism Clan (computer gaming) Attention management 148 (number) Scale-Free Ideal Network (SFIN) Social Thermodynamics Theory 150 (number) Zoonosis