Warren Ellis » Death Rat City
Link to an article by Will Wiles on John Calhoun’s rodent overcrowding experiments. I like Lewis Thomas’s take better though:
It will be protested that I am setting up a new sort of straw demonology, postulating external causes for pathological events that are intrinsic. It is not in the nature of complex social systems to go wrong, all by themselves, without external cause? Look at overpopulation. Look at Calhoun’s famous model, those crowded colonies of rats and their malignant social pathology, all due to their own skewed behavior. Not at all, is my answer. All you have to do is find the meddler, in this case Professor Calhoun himself, and the system will put itself right. The trouble with those rats is not the innate tendency of crowded rats to go wrong, but the scientists who took them out of the world at large and put them into too small a box.[my emphasis]