A Spiritual Death
Ethologist John Calhoun conducted a series of experiments involving captive populations of Norwegian rats– rat utopias — between 1958 and 1962. He found that as the populations rapidly overexpanded, the rats began to act in strange ways, growing more wild and isolated, as well as engaging in wanton violence.
Calhoun described the collapse as “behavioral sink.” Here’s more from Greg Reese on The Reese Report.


