Neanderthals and Homo sapiens: Cognitively Different Kinds of Human?
Membership of an extensive social network is imperative for human survival. However, maintaining network cohesion is particularly challenging for hunter–gatherers because they are dispersed over large home ranges and need to keep track of absent social partners for extended periods. The archaeological record suggests that compared to Neanderthals, contemporary modern humans maintained social ties between greater numbers of individuals over greater distances. I argue that such differences would have influenced neural development, driving differences in brain structure and the degree of social complexity that each taxon could sustain cognitively. Following recent suggestions that modern humans’ larger parietals might suggest an enhanced ability to create a ‘virtual inner world’, I hypothesise that this capacity allowed them to monitor larger numbers of absent social partners and thus maintain larger dispersed social networks than their Neanderthal counterparts. Larger social networks would have boosted the ability of modern humans to insure against local resource failure, sustain demographic stability and conserve cultural innovations.
KeywordsSocial networks Sociocognition Neural plasticity Hunter–gatherers Social archaeology
I thank Emiliano Bruner, Thomas Wynn, Kit Opie, Robin Dunbar, Prajñaketu Holden and Iain Morley for comments on various versions of this paper. This work was funded by the European Research Council (295663). The author declares no conflict of interest.
- Binford L (2001) Constructing frames of reference: an analytical method for archaeological theory building using ethnographic and environmental data sets. University of California Press, BerkeleyGoogle Scholar
- Bruner E (2010b) The evolution of the parietal cortical areas in the human genus: between structure and cognition. In: Yuan M, Schick K, Toth N (eds) The human brain evolving: paleoneurological studies in honor of Ralph L. Holloway. Stone Age Institute, Gosport, IN, pp 83–96Google Scholar
- Bruner E, Román FJ, de la Cuétara JM, Martin-Loeches M, Colom R (2015) Cortical surface area and cortical thickness in the precuneus of adult humans. Neuroscience 286:345–352. https://doi.org/10.1016/j.neuroscience.2014.11.063CrossRefPubMedPubMedCentralGoogle Scholar
- Bruner E, Spinapolice E, Burke A, Overmann K (2018) Visuospatial integration: paleoanthropological and archaeological perspectives. In: di Paolo LD, di Vincenzo F, Almeida A (eds) Evolution of primate social cognition. Springer, ChamGoogle Scholar
- Devlin K (2000) The role of conceptual structure in human evolution. Brain 1867:1–12Google Scholar
- Gamble C (1999) The Palaeolithic societies of Europe. Cambridge world archaeology. Cambridge University Press, CambridgeGoogle Scholar
- Hills TT, Todd PM, Lazer D, Redish AD, Couzin ID, Cognitive Search Research Group (2015) Exploration versus exploitation in space, mind, and society. Trends Cogn Sci 19(1):46–54. https://doi.org/10.1016/j.tics.2014.10.004.ExplorationCrossRefPubMedPubMedCentralGoogle Scholar
- Iriki A, Taoka M (2012) Triadic (ecological, neural, cognitive) niche construction: a scenario of human brain evolution extrapolating tool use and language from the control of reaching actions. Philos Trans R Soc Lond B Biol Sci 367(1585):10–23. https://doi.org/10.1098/rstb.2011.0190CrossRefPubMedPubMedCentralGoogle Scholar
- Weinstein D, Launay J, Pearce E, Dunbar RIM, Stewart L (2015) Singing and social bonding: changes in connectivity and pain threshold as a function of group size. Evol Hum Behav. https://doi.org/10.1016/j.evolhumbehav.2015.10.002CrossRefPubMedPubMedCentralGoogle Scholar