Why is the crowd always aggressive

A crowd or group of demonstrators defending common goals never behaves the same way as ordinary people when they invade its territory. The crowd behavior is completely different. As the density increases, the personal space of each person is reduced, which leads to increased hostility. That is why the larger the crowd, the more aggressive it is. In a large crowd, fights and conflicts often arise. The police are trying to cut the crowd into separate groups. Thanks to this technique, personal space is increased in people, and this calms them down.
Governments and city architects only recently began to understand the effect that dense construction and density of people have on the mood of people. In a modern city, a person loses his personal territory. Scientists conducted an experiment with deer on James Island, located two kilometers off the coast of Maryland in the Chesapeake Bay. Despite the fact that there was enough food on the island, there were no predators and there were no infectious diseases, deer died in large numbers. Similar results were obtained in experiments on rabbits and mice. As it turned out later, deer died from excessive activity of the adrenal glands associated with stress caused by an increase in the population and a decrease in personal territory. The adrenal glands play an important role in regulating growth, reproduction, and the protective functions of the body. The physiological response to stress associated with overpopulation led to death. Stress was stronger than hunger, disease and aggression. That is why the highest crime rates are recorded in cities with the highest population density.

One of the basic needs of man is the need for his own land. This craving is explained by the desire to gain spatial freedom, which we lack so much.

Investigators deliberately invade the personal space of criminals in order to break their resistance during interrogation. The offender is put on a chair screwed to the floor without armrests in the middle of the room, and then in every possible way invade his intimate zone (and even the closest one), asking questions and waiting for answers. Usually, even a very insignificant duration of the invasion of personal space is enough to break the resistance of the criminal.