A data-modelling system will be set up and developed to simulate gene-culture co-evolution, and used to investigate the possible effects of population size and structure, and of behavioural innovation rate, on cultural diversity. The project will utilise a meta-population structure model (with demes linked by low-level migration), in which cultural variants spread between individuals through social learning, and can propagate to other demes through migration. Such social interaction models are familiar in mathematical epidemiology(7), but their application to knowledge diffusion dynamics is less well understood.