In human evolution modern behaviour is marked by the appearance of new technologies including improved hunting and food processing techniques, long-distance exchange of materials, body decoration, and abstract and realistic art. Many causes have been proposed, including increased intelligence, language, social organization and cooperation, climate variability, and increased lifespan, although none of these adequately explain the timing of this fundamental shift in human behaviour in different parts of the world. We will see how population density and connectivity between groups affects the maintenance of skills and technologies, and could led to accelerated innovation without any fundamental increase in intelligence.
Mark Thomas is Professor of Evolutionary Genetics at University College London and works mainly on biological and cultural aspects of human evolution. He uses computer simulation and statistical modelling to make inferences from genetic data - including ancient DNA - and archaeological information, on processes such as past migrations and dispersals, natural selection - particularly in response to changes in diet and infectious disease loads - and how demography shapes cultural evolution.
This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at ted.com/tedx