In the late 20th Century, John B. Calhoun decided to make Utopia; it started with rats. In 1947 he began to watch a colony of Norway rats, over 28 months he noticed something, in that time the population could have increased to 50,000 rats, but instead it never even rose above 200. Then he noticed that the colony split into smaller groups of 12, any more and groups would split apart. He continued to study rats up until 1954. Then in 1958, he made his first lab.
He bought the second floor of a barn, and there he made his office and lab. For four years he had Universe 1, a large room homing rats and mice alike. It was split into four spacious pens connected by ramps, each filled with rats. The thronging mass of rats produced an overpowering odour, it took a few minutes before anyone could breathe normally. After 4 years he moved away from the farm, in 1963 he produced his most famous creation, Universe 1. The worlds first mouse mortality-inhibiting-environment.
2.7 metres square with 1.4m high walls. The ‘Universe’ was surrounded by 16 tunnels leading to food, water and burrows. No predators, no scarcity, the mice would have to be blind to not see the utopia around them. That is how it started, Utopia. Then the mice, four breeding pairs in all, were introduced into Universe 1. After 104 days they adjusted to the new world and the population began to grow, doubling every 55 days. Day 315 and the population reached 620, then it stopped. The population grew much more slowly as the mice came against the limit of space, their only frontier.
Then the societal breakdown, young were expelled before they had been properly weaned and the attacking of young. Dominant males couldn’t defend their territory and females became more aggressive, non-dominant males became passive, not retaliating to attacks. The last healthy birth came on the 600th day. Then there were no children. Then came extinction.