First i thought, its some random FB crap.. But this experiment is mentioned on wikipedia too..
“When a population loses purpose, meaning, and social bonds — it dies long before its body does.”
In the late 1960s, American ethologist Dr. John B. Calhoun built what he called a “Mouse Paradise” — a perfectly controlled world with unlimited food, water, and shelter.
No predators. No scarcity. No fear.
Only abundance.
At first, it was heaven. The mice thrived, multiplied, and built their tiny cities. But when their population swelled past 600, something began to unravel.
The strong claimed the best nesting areas.
Weaker males were bullied into corners.
Mothers stopped caring for their young — some even turned against them.
Violence erupted. Mating ceased.
And gradually, the colony lost its will to live.
Though the food never ran out, purpose did.
The final generations grew passive and detached — grooming endlessly, avoiding contact, showing no interest in survival or connection. Calhoun called this stage “the behavioral sink” — a collapse not of body, but of spirit.
When the last mouse died, the habitat still overflowed with everything they could ever need.
Calhoun repeated this experiment 25 times, and every time, the outcome was the same.
His conclusion echoed far beyond the cages:
“When a population loses purpose, meaning, and social bonds — it dies long before its body does.”
