From (O)CT(O)PUS at The Swash Zone:
How can we account for a rash of mass murders that defy explanation but have become all too commonplace?
Perhaps it is time to revisit the research of John B. Calhoun, who studied the effects of over-crowding on social animals at the National Institute of Mental Health (NIMH). Originally published in 1962, his findings have profound implications in the fields of architecture, urban planning, criminology, and the psychosocial sciences.
Imagine a fully enclosed 9-foot by 9-foot square box. Introduce fours pairs of breeding mice and supply unlimited amounts of food, water, and nesting material. In essence, Calhoun created a perfect utopian environment free from predators. All things being equal, the only test variable under study was the confined space of a box.
Calhoun watched the population double every 55 days. He observed profound breakdowns in social structure over time and a dramatic increase in the rate of internecine violence.