Language as a coordination tool evolves slowly

Authored by Tamas David-Barrett, Robin I M Dunbar

Date Published: 2016

DOI: 10.1098/rsos.160259

Sponsors: European Union European Research Council (ERC)

Platforms: No platforms listed

Model Documentation: Other Narrative Mathematical description

Model Code URLs: Model code not found

Abstract

Social living ultimately depends on coordination between group members, and communication is necessary to make this possible. We suggest that this might have been the key selection pressure acting on the evolution of language in humans and use a behavioural coordination model to explore the impact of communication efficiency on social group coordination. We show that when language production is expensive but there is an individual benefit to the efficiency with which individuals coordinate their behaviour, the evolution of efficient communication is selected for. Contrary to some views of language evolution, the speed of evolution is necessarily slow because there is no advantage in some individuals evolving communication abilities that much exceed those of the community at large. However, once a threshold competence has been achieved, evolution of higher order language skills may indeed be precipitate.

Tags

Evolution Cooperation Primates Humans Indirect reciprocity Societies Group-size Social brain Costly punishment Relatives