John Calhoun’s “Population Density and The Mouse Utopia" (1962) Funded by The Rockefeller Foundation
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John Calhoun’s “Population Density and The Mouse Utopia" (1962) Funded by The Rockefeller Foundation
NLM Announces the Public Release of the Papers of John B. Calhoun, Noted NIH Researcher in Social Crowding and Aggression Source: https://wayback.archive-it.org/org-350/20180911191924/https://www.nlm.nih.gov/news/calhoun_papers_released.html Additional information about Calhoun's subsequent work as follows: An excerpt of Encyclopedia Britanica ...
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John B. Calhoun’s Mouse Utopia Experiment and Reflections on the Welfare State
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In 1968, ethologist John B. Calhoun created "Universe 25." It was a mouse utopia. unlimited food, unlimited water, zero predators, and perfect climate control. It was designed to support 3,800 mice. But the population peaked at just 2,200 and then collapsed to zero. Why? Because without the struggle to survive, the mice broke psychologically. They formed violent gangs, mothers abandoned their babies, and a group called "The Beautiful Ones" emerged—males who stopped fighting or mating and did not
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In 1968, ethologist John B. Calhoun created "Universe 25." It was a mouse utopia. unlimited food, unlimited water, zero predators, and perfect climate control. It was designed to support 3,800 mice. But the population peaked at just 2,200 and then collapsed to zero. Why? Because without the struggle to survive, the mice broke psychologically. They formed violent gangs, mothers abandoned their babies, and a group called "The Beautiful Ones" emerged—males who stopped fighting or mating and did not
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