Coping with crowding.

Focuses on the social ramifications of high population density. Description of a study noting an increase in the aggression of rats in relation to the density of their environment; Effects of human population density on rates of violence and crime; Description of a study noting the behavior of monkeys among varying populations; Use of grooming as a type of calming behavior among monkeys; Reduction of social interaction among chimpanzees kept together in confined spaces; Role of competition for food.