hessian writes: A team of primatologists headed by Kevin Langergraber of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, pulled together behavioural data on nine wild chimpanzee groups, and analysed DNA samples from 246 individual apes. Groups that were more genetically different turned out to have significantly more differences in their behaviours (Proceedings of the Royal Society B, DOI: 10.1098/rspb.2010.1112).
The only possible interpretation of any research whatever in the `social
sciences' is: some do, some don't.
-- Ernest Rutherford