Ever wonder why players get mad at each other in raids? Melvin Konner’s book, “The Tangled Wing: Biological Constraints on Human Nature” gave me an idea.

A large number of experiments have shown that pain, irritation, frustration, and fear increase the likelihood of aggression in a wide variety of situations in animals and humans — confirmations of the “frustration-aggression hypothesis.” … For example, two rats are placed near each other on an electrified grid and shocked; one typical response is to attack each other, particularly if both are males. In other experiments, pain is not directly involved, but motivational behavior of various sorts is aroused in the animal and then deliberately frustrated. This situation also typically increases the likelihood of aggressive behavior.