Imagine the growth of our human lives, the views of millions of people who were buried beneath the scenes of this development, the eyes of my sage scientist John Calhoun rattled the picture of the state of the rats. In this mid-fifties, this gentleman had a curious interest in rats. His curiosity was that if there is a growing number of species of animals in comparison to the place for normal living and easy movement, then what can happen? In a particular place, he kept a couple of pains, adult males and male rats, provided adequate food for them regularly, and kept home-made equipment. He ensured that the cat or any other rats could not enter the house of the rats.

That means, enough space for living, adequate food, security from the invasion of external forces, by giving some of the security, John Calhoun named the place of his mice 'mouse paradise' or rat heaven In the heavens, the rats continued to feed and regenerate in ecstasy. At one stage, the members of Calhoun and his research team noticed that the rats are crowded around the food pots kept in the middle of their house. There are food items at the four corners and corners, they have adequate food, but most of the rats are gathered around the middle food pots. The crowd is rushing towards the crowd seeing the crowd. As a result, there is pushing, fights, getting bites. The happy atmosphere of the rat heaven is becoming increasingly unsettled and unstable.

John Callhuun named the trend of raising the crowd of mice, 'pathological reasoning', in Bengal, it can be said that there is a strong tendency of gathering or gathering crowd, which is unusual for diseases. Later, many people who have studied the psychology and behavior of urban dwellers and city dwellers, compared this with the Pathologic Togetherness of Calhoun Rats to the psychology of the urban people. American author and journalist Robert Ardre, in an article in 1970, commented, "The way Calhoun mice chooses mid-meal pots, just like we are leaving the city."

This is not the end. Once the number of rats increased, Calhoun researcher members found that the rats of heaven are going to be hell: the male rats have become aggressive; They twist the group, kill them, bite him. They attack, especially on girls and mice. Their sexual behavior has undergone a lot of changes: some rats became gay, and some became pancakesual. And one group is addicted (hypercoxual), trying to get up on what they get in front of them. In their oppression, the female rats escape from house to house, do not make hospices, do not take care of children, sometimes even bite their own kids. As a result children die, in some parts of the rats, the rate of death of the children increases even 96 percent. Mild-natured mice withdraw mentally withdrawing to the oppressive rats, they move towards the edges and corners of the house. Calhoun said that these rats survive in physical sense, but they are in exchange for a great psychological cost (in the form of the encephalous psychological cost). Changes in sexual behavior and violent anarchy at one stage reduced the proportion of rats on one side, on the other hand the lion died of lice.

John Calhoun draws the conclusion of this test: The overall behavioral disaster occurs among them if their numbers are too much compared to the place for the normal peaceful living and wanderings of the rats; He said it 'Behavioral Sink'. At one stage of increasing dynamism, their behavioral disasters became so fierce that they lost their ability to settle peacefully permanently. Due to the death of many rats, their total number is reduced and they are no longer able to return to normalcy, and they do not get the ability to co-habituate peacefully. That is, they do not behave in a stage of dynamics and are not like rats.

Dear reader, look at this picture of the current state of Calhun's rat kingdom. Something to match?

Writer: Moshiul Alam (Assistant Secretary and Literary of prothomalo newspaper)