A critical review of Dunbar’s social brain hypothesis

  1. Cristina Acedo-Carmona 1
  2. Antoni Gomila 1
  1. 1 University of the Balearic Islands, España
Revista:
Revista internacional de sociología

ISSN: 0034-9712

Any de publicació: 2016

Volum: 74

Número: 3

Tipus: Article

DOI: 10.3989/RIS.2016.74.3.037 DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Revista internacional de sociología

Resum

Dunbar’s social brain hypothesis constitutes an influential position among those that relate the evolution of human cognition and sociality. In this work, we first present the essentials of the theory and discuss the paleoanthropological and social evidence claimed to support it. We also point out its shortcomings, which have to do with the general strategy of finding linear relations among different traits, the lack of attention to the mental capacities that make human social life possible, and the diversity of social relations and structures that take place. We put forward our way of complementing Dunbar’s approach by focusing on the role of trust in cementing society and explaining diversity.

Informació de finançament

This research was funded by the Research Projects FFI2010-20759 and FFI2013-44007-P (Spanish Ministry of Science and Innovation). Cristina Acedo Carmona was supported by a Ph.D. fellowship from the Spanish Ministry of Education (AP2009-3369).

Finançadors

Referències bibliogràfiques

  • Acedo-Carmona, C. and Gomila, A. 2014. "Personal trust increases cooperation beyond general trust". PloS ONE 9(8): e105559. http://dx.doi.org/10.1371/journal.pone.0105559 PMid:25144539 PMCid:PMC4140793
  • Aiello, L. and Dunbar, R. 1993. "Neocortex size, group size and the evolution of language". Current Anthropology 34: 184-193. http://dx.doi.org/10.1086/204160
  • Barrett, L., Henzi, P. and Dunbar, R.I.M. 2003. "Primate cognition: from 'what now?' to 'what if?'". Trends in Cognitive Sciences 7, 11: 494-497. http://dx.doi.org/10.1016/j.tics.2003.09.005 PMid:14585446
  • Byrne, R.W. 1995. The Thinking Ape. Oxford: Oxford University Press.
  • Byrne, R.W. and Whiten, A. 1988. Machiavellian intelligence. Oxford: Oxford University Press.
  • Cohen, J.E. 1971. Casual groups of monkeys and men. Cambridge: Harvard University Press. http://dx.doi.org/10.4159/harvard.9780674430556
  • Croney, C.C. and Newberry, R.C. 2007. "Group size and cognitive processes". Applied Animal Behavior Science 103: 215-228. http://dx.doi.org/10.1016/j.applanim.2006.05.023
  • Curry, O. and Dunbar, R.I.M. 2011. "Altruism in networks: the effect of connections". Biology Letters 7, 5: 651-653. http://dx.doi.org/10.1098/rsbl.2010.1202 PMid:21411451 PMCid:PMC3169038
  • Dávid-Barrett, T. and Dunbar, R.I.M. 2012. "Cooperation, behavioural synchrony and status in social networks". Journal of Theoretical Biology 308: 88-95. http://dx.doi.org/10.1016/j.jtbi.2012.05.007 PMid:22609470
  • Dunbar, R.I.M. 1988. Primate Social Systems. London: Chapman & Hall. http://dx.doi.org/10.1007/978-1- 4684-6694-2
  • Dunbar, R.I.M. 1991. "Functional significance of social grooming in primates". Folia Primatologica 57: 121-131. http://dx.doi.org/10.1159/000156574
  • Dunbar R.I.M. 1992. "Neocortex size as a constraint on group size in primates". Journal of Human Evolution 20: 469- 493. http://dx.doi.org/10.1016/0047-2484(92)90081-J
  • Dunbar, R.I.M. 1993. "Co-evolution of neocortex size, group size and language in humans". Behavioral and Brain Sciences 16, 4: 681-735. http://dx.doi.org/10.1017/S0140525X00032325
  • Dunbar, R.I.M. 1995. "Neocortex size and group size in primates: a test of the hypothesis". Journal of Human Evolution 28: 287-296. http://dx.doi.org/10.1006/jhev.1995.1021
  • Dunbar, R.I.M., Marriott, A. and Duncan, N.D.C. 1997. "Human conversational behaviour". Human Nature 8, 3: 231- 246. http://dx.doi.org/10.1007/BF02912493 PMid:26196965
  • Dunbar, R.I.M. 1998. "The social brain hypothesis". Evolutionary Anthropology 6, 5: 178-190. http://dx.doi.org/10.1002/(SICI)1520-6505(1998)6:5<178::AID-EVAN5>3.0.CO;2-8
  • Dunbar, R.I.M. 2003. "The social brain: mind, language, and society in evolutionary perspective". Annual Review of Anthropology 32:163-181. http://dx.doi.org/10.1146/annurev.anthro.32.061002.093158
  • Dunbar, R.I.M. and Shultz, S. 2007a. "Evolution in the social brain". Science 317: 1344-1347. http://dx.doi.org/10.1126/science.1145463 PMid:17823343
  • Dunbar, R.I.M. and Shultz, S. 2007b. "Understanding primate brain evolution". Philosophical Transactions of the Royal Society B 362: 649-658. http://dx.doi.org/10.1098/rstb.2006.2001 PMid:17301028 PMCid:PMC2346523
  • Dunbar, R.I.M. 2009a. "The social brain hypothesis and its implications for social evolution". Annals of Human Biology 36, 5: 562-572. http://dx.doi.org/10.1080/03014460902960289 PMid:19575315
  • Dunbar, R.I.M. 2009b. "Why only humans have language". Pp. 12-35 in The Prehistory of Language. 1st ed. New York: Oxford University Press. http://dx.doi.org/10.1093/acprof:oso/9780199545872.003.0002
  • Dunbar, R.I.M. 2010. "The social role of touch in humans and primates: behavioural function and neurobiological mechanisms". Neuroscience and Biobehavioral Reviews 34: 260-268. http://dx.doi.org/10.1016/j.neubiorev.2008.07.001 PMid:18662717
  • Dunbar, R.I.M. 2012a. "Bridging the bonding gap: the transition from primates to humans". Philosophical Transactions of the Royal Society B 367: 1837-1846. http://dx.doi.org/10.1098/rstb.2011.0217 PMid:22641822 PMCid:PMC3367699
  • Dunbar, R.I.M. 2012b. "Social cognition on the Internet: testing constraints on social network size". Philosophical Transactions of the Royal Society B 367: 2192-2201. http://dx.doi.org/10.1098/rstb.2012.0121 PMid:22734062 PMCid:PMC3385686
  • Finlay, B.L. and Darlington, R.B. 1995. "Linked regularities in the development and evolution of mammalian brains". Science 268: 1578-1584. http://dx.doi.org/10.1126/science.7777856 PMid:7777856
  • Fletcher, P., Happé, F., Frith, U., Baker, S.C., Dolan, R.J., Frakowiak, R.S.J. and Frith, C.D. 1995. "Other minds in the brain: a functional imaging study of "theory of mind" in story comprehension". Cognition 57, 2: 109– 128. http://dx.doi.org/10.1016/0010-0277(95)00692-R
  • Freeberg, T.M., Dunbar, R.I.M. and Ord, T.J. 2012. "Social complexity as a proximate and ultimate factor in communicative complexity". Philosophical Transactions of the Royal Society B 367: 1785-1801. http://dx.doi.org/10.1098/rstb.2011.0213 PMid:22641818 PMCid:PMC3367695
  • Henzi, S.P., de Sousa Pereira, L.F., Hawker-Bond, D., Stiller, J., Dunbar, R.I.M. and Barrett, L. 2007. "Look who's talking: developmental trends in the size of conversational cliques". Evolution and Human Behavior 28: 66-74. http://dx.doi.org/10.1016/j.evolhumbehav.2006.07.002
  • Hill, R.A. and Dunbar, R.I.M. 1998. "An evaluation of the roles of predation rate and predation risk as selective pressures on primate grouping behaviour". Behaviour 135: 411- 430. http://dx.doi.org/10.1163/156853998793066195
  • Hill, R.A. and Dunbar, R.I.M. 2003. "Social network size in humans". Human Nature 14, 1: 53-72. http://dx.doi.org/10.1007/s12110-003-1016-y PMid:26189988
  • Humphrey, N.K. 1976. "The social function of intellect". Pp. 303- 317 in Growing Points in Ethology. 1st ed. Cambridge: Cambridge University Press.
  • Hutchinson, S., Hui-Lin Lee, L., Gaab, N. and Schlaug, G. 2003. "Cerebellar volume of musicians". Cerebral Cortex 13, 9: 943-949. http://dx.doi.org/10.1093/cercor/13.9.943 PMid:12902393
  • Kinderman, P., Dunbar, R., Bentall, R.P. 1998. "Theory-of-mind deficits and causal attributions". British Journal of Psychology 89: 191-204. http://dx.doi.org/10.1111/j.2044-8295.1998.tb02680.x
  • Kudo, H. and Dunbar, R.I.M. 2001. "Neocortex size and social network size in primates". Animal Behaviour 62: 711- 722. http://dx.doi.org/10.1006/anbe.2001.1808
  • Lehmann, J., Korstjens, A.H. and Dunbar, R.I.M. 2007. "Group size, grooming and social cohesion in primates". Animal Behaviour 74: 1617-1629. http://dx.doi.org/10.1016/j.anbehav.2006.10.025
  • Lewis, P.A., Rezaie, R., Brown, R., Roberts, N. and Dunbar, R.I.M. 2011. "Ventromedial prefrontal volume predicts understanding of others and social network size". Neuroimage 57: 1624-1629. h http://dx.doi.org/10.1016/j.neuroimage.2011.05.030 PMid:21616156
  • Lin, N. 1999. "Building a network theory of social capital". Connections 22: 153-159.
  • Machin, A.J. and Dunbar, R.I.M. 2011. "The brain opioid theory of social attachment: a review of the evidence". Behaviour 148, 9-10: 985-1025.
  • McNab, B.K. and Eisenberg, J.F. 1989. "Brain size and its relation to the rate of metabolism in mammals". American Naturalist 133:157-167. http://dx.doi.org/10.1086/284907
  • McPherson, M., Smith-Lovin, L., Brashears, M.E. 2006. "Social isolation in America: changes in core discussion networks over two decades". American Sociological Review 71: 353- 375. http://dx.doi.org/10.1177/000312240607100301
  • Mesoudi, A., Whiten, A. and Dunbar, R.I.M. 2006. "A bias for social information in human cultural transmission". British Journal of Psychology 97: 405-423. http://dx.doi.org/10.1348/000712605X85871 PMid:16848951
  • Miller, G.A. 1956 "The magical number seven, plus or minus two: some limits on our capacity for processing information". Psychological Review 63: 81-97. http://dx.doi.org/10.1037/h0043158 PMid:13310704
  • Mok, D., Wellman, B., Basu, R. 2007. "Did distance matter before the Internet? Interpersonal contact and support in the 1970s". Social Networks 29: 430-461. http://dx.doi.org/10.1016/j.socnet.2007.01.009
  • Moll, H. and Tomasello, M. 2007. "Cooperation and human cognition: the Vygotskian intelligence hypothesis". Philosophical Transactions of the Royal Society B 362: 639-648. http://dx.doi.org/10.1098/rstb.2006.2000 PMid:17296598 PMCid:PMC2346522
  • Powell, J., Lewie, P.A., Roberts, N., García-Fi-ana, M. and Dunbar, R.I.M. 2012. "Orbital prefrontal cortex volume predicts social network size: an imaging study of individual differences in humans". Proceedings of the Royal Society B 279, 1736: 2157-2162. http://dx.doi.org/10.1098/rspb.2011.2574 PMid:22298855 PMCid:PMC3321718
  • Roberts, S.G.B., Wilson, R., Fedurek, P. and Dunbar, R.I.M. 2008. "Individual differences and personal social network size and structure". Personality and Individual Differences 44: 954-964. http://dx.doi.org/10.1016/j.paid.2007.10.033
  • Roberts, S.G.B., Dunbar, R.I.M., Pollet, T.V. and Kuppens, T. 2009. "Exploring variation in active network size: Constraints and ego characteristics". Social Networks 31: 138-146. http://dx.doi.org/10.1016/j.socnet.2008.12.002
  • Roberts, S.G.B. and Dunbar, R.I.M. 2010. "The costs of family and friends: an 18-month longitudinal study of relationship maintenance and decay". Evolution and Human Behavior 32: 186–197. http://dx.doi.org/10.1016/j.evolhumbehav.2010.08.005
  • Shultz, S. and Dunbar, R.I.M. 2006. "Both social and ecological factors predict ungulate brain size". Proceedings of the Royal Society B 22, 273, 1583: 207-215. http://dx.doi.org/10.1098/rspb.2005.3283
  • Shultz, S. and Dunbar, R.I.M. 2007. "The evolution of the social brain: anthropoid primates contrast with other vertebrates". Proceedings of the Royal Society B 274: 2429-2436. http://dx.doi.org/10.1098/rspb.2007.0693 PMid:17652066 PMCid:PMC2274976
  • Shultz, S., Nelson, E. and Dunbar, R.I.M. 2012. "Hominin cognitive evolution: identifying patterns and processes in the fossil and archaeological record." Philosophical Transactions of the Royal Society B 367: 2130-2140. http://dx.doi.org/10.1098/rstb.2012.0115 PMid:22734056 PMCid:PMC3385680
  • Stiller, J. and Dunbar, R.I.M. 2007. "Perspective-taking and memory capacity predict social network size". Social Networks 29: 93-104. http://dx.doi.org/10.1016/j.socnet.2006.04.001
  • Sutcliffe, A., Dunbar, R.I.M., Binder, J. and Arrow, H. 2011. "Relationships and the social brain: integrating psychological and evolutionary perspectives". British Journal of Psychology 103: 149-168 . http://dx.doi.org/10.1111/j.2044-8295.2011.02061.x PMid:22506741
  • Utz, S. 2007. "Media use in long-distance friendships". Information, Communication and Society 10: 694-713. http://dx.doi.org/10.1080/13691180701658046
  • Van Schaik, C.P. 1983. "Why are diurnal primates living in groups?" Behaviour 87:120-144. http://dx.doi.org/10.1163/156853983X00147
  • Zhou, W.X., Sornette, D., Hill, R.A. and Dunbar, R.I.M. 2005. "Discrete hierarchical organization of social group sizes". Proceedings of the Royal Society B 272: 439- 444. http://dx.doi.org/10.1098/rspb.2004.2970 PMid:15734699 PMCid:PMC1634986