proximity to one another over long periods of time, this increases the chances that offspring of the group may mate with related individuals. Offspring resulting from inbreeding have an increased chance to be affected by recessive or deleterious traits, thus reducing its survivability and ability to reproduce. The risk of inbreeding however, is only prevalent in smaller, isolated groups, as larger group sizes dilutes the chance of an individual mating with its relatives. Further reading Ward, A. and Webster, M., 2016. Sociality: the behaviour of group-living animals. Berlin, Germany: Springer. References Evolutionary biology Ethnology