Cultural brain hypothesis and gene-culture co-evolution
"evidence of recent co-evolution between genes and large-scale culture

This 2018 PLOS Computation Biology simulation study - The Cultural Brain Hypothesis examined the data from animals and humans. It found a relationship between brain size, adaptive knowledge, social learning, group size, and lifespan across the animal kingdom.


  
  relationships between brain size, group size, innovation, social learning, mating structures, and the length of the juvenile period that are supported by the existing empirical literature.
  


The study found evidence of cumulative cultural evolution explaining the brain human sizes.