"Universe 26" The idea comes from "Universe 25” "Behavioral sink" in John B. Calhoun most famous experiment in the series, "Universe 25", population peaked at 2,200 mice and thereafter exhibited a variety of abnormal, often destructive behaviors. By the 600th day, the population was on its way to extinction. Since Calhoun provided unlimited resources, such as water, food, and also protection from predators as well as from disease and weather, the rats were said to be in "rat utopia" or "mouse paradise". 

Calhoun himself saw the fate of the population of mice as a metaphor for the potential fate of man. He characterized the social breakdown as a "spiritual death", with reference to bodily death as the "second death" mentioned in the Biblical book of Revelation 2:11