Hierarchical social modularity in gorillas
Modern human societies show hierarchical social modularity (HSM) in which lower-order social units like nuclear families are nested inside increasingly larger units. It has been argued that this HSM evolved independently and after the chimpanzee–human split due to greater recognition of, and bonding...
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ftpubman:oai:pure.mpg.de:item_3134794 2023-08-27T04:12:21+02:00 Hierarchical social modularity in gorillas Morrison, R. Groenenberg, M. Breuer, T. Manguette, M. Walsh, P. 2019-07 application/pdf http://hdl.handle.net/21.11116/0000-0004-0D49-D http://hdl.handle.net/21.11116/0000-0004-0D4D-9 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2019.0681 http://hdl.handle.net/21.11116/0000-0004-0D49-D http://hdl.handle.net/21.11116/0000-0004-0D4D-9 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Proceedings of the Royal Society B: Biological Sciences info:eu-repo/semantics/article 2019 ftpubman https://doi.org/10.1098/rspb.2019.0681 2023-08-02T01:33:03Z Modern human societies show hierarchical social modularity (HSM) in which lower-order social units like nuclear families are nested inside increasingly larger units. It has been argued that this HSM evolved independently and after the chimpanzee–human split due to greater recognition of, and bonding between, dispersed kin. We used network modularity analysis and hierarchical clustering to quantify community structure within two western lowland gorilla populations. In both communities, we detected two hierarchically nested tiers of social structure which have not been previously quantified. Both tiers map closely to human social tiers. Genetic data from one population suggested that, as in humans, social unit membership was kin structured. The sizes of gorilla social units also showed the kind of consistent scaling ratio between social tiers observed in humans, baboons, toothed whales, and elephants. These results indicate that the hierarchical social organization observed in humans may have evolved far earlier than previously asserted and may not be a product of the social brain evolution unique to the hominin lineage. Article in Journal/Newspaper toothed whales Max Planck Society: MPG.PuRe Proceedings of the Royal Society B: Biological Sciences 286 1906 20190681 |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
Modern human societies show hierarchical social modularity (HSM) in which lower-order social units like nuclear families are nested inside increasingly larger units. It has been argued that this HSM evolved independently and after the chimpanzee–human split due to greater recognition of, and bonding between, dispersed kin. We used network modularity analysis and hierarchical clustering to quantify community structure within two western lowland gorilla populations. In both communities, we detected two hierarchically nested tiers of social structure which have not been previously quantified. Both tiers map closely to human social tiers. Genetic data from one population suggested that, as in humans, social unit membership was kin structured. The sizes of gorilla social units also showed the kind of consistent scaling ratio between social tiers observed in humans, baboons, toothed whales, and elephants. These results indicate that the hierarchical social organization observed in humans may have evolved far earlier than previously asserted and may not be a product of the social brain evolution unique to the hominin lineage. |
format |
Article in Journal/Newspaper |
author |
Morrison, R. Groenenberg, M. Breuer, T. Manguette, M. Walsh, P. |
spellingShingle |
Morrison, R. Groenenberg, M. Breuer, T. Manguette, M. Walsh, P. Hierarchical social modularity in gorillas |
author_facet |
Morrison, R. Groenenberg, M. Breuer, T. Manguette, M. Walsh, P. |
author_sort |
Morrison, R. |
title |
Hierarchical social modularity in gorillas |
title_short |
Hierarchical social modularity in gorillas |
title_full |
Hierarchical social modularity in gorillas |
title_fullStr |
Hierarchical social modularity in gorillas |
title_full_unstemmed |
Hierarchical social modularity in gorillas |
title_sort |
hierarchical social modularity in gorillas |
publishDate |
2019 |
url |
http://hdl.handle.net/21.11116/0000-0004-0D49-D http://hdl.handle.net/21.11116/0000-0004-0D4D-9 |
genre |
toothed whales |
genre_facet |
toothed whales |
op_source |
Proceedings of the Royal Society B: Biological Sciences |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1098/rspb.2019.0681 http://hdl.handle.net/21.11116/0000-0004-0D49-D http://hdl.handle.net/21.11116/0000-0004-0D4D-9 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1098/rspb.2019.0681 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
286 |
container_issue |
1906 |
container_start_page |
20190681 |
_version_ |
1775356417422655488 |