The banished ones moved to the new places, adapted to the new environment, reproduced and again banished the asocial and cleverer individuals from their society. Those individuals were always banished who due to the highly-developed domain intellect were individualists and badly submitted to the social management. Thus, the cleverest and indestructible ones were banished which were clever enough to unite with the same ones and that was the danger for the “leaders” of the pack. The domain experts were always tried to be banished and they constantly moved looking for the places of the Earth worldwide.
S. Saveliev supposes that human brain was growing while human being had a place to migrate and until the socialization has become the main branch of the development of humanity. At once as the main problems of surviving acquired the social character (it was about 100 thousand years ago), the brain started to lose weight.
Here is the opinion of the professor S. Saveliev, recorded by Anna Natitnik – head of the editor of the "Harvard Business Review – Russia" See:Natitnik А. The society banishes the clever ones (interview). United Press, May 2012.
“Millions and even more years ago the social structure of society thanks to the fiercest internal selection developed frontal lobe of the brain. In humans this area is huge: the rest of mammals have it much smaller relative to the whole brain. The formed frontal area was not designed to think, but to make an individual share food with a neighbour. No animal is able to share food, because food is a source of energy. And people who did not share food in a social group were simply eliminated”.
Brain was growing until there was a place for people to migrate and while they had to deal with only biological tasks. When humanity faced the social problems, the brain began to lose weight. This process began about 100 thousand years ago. About 30 thousand years ago that has led to the destruction of the Neanderthals. They were smarter, stronger than our ancestors, the Cro-Magnons; they creatively solved all the problems, they came up with tools, means of making fire, etc. But due to the fact that they lived in small populations, their social selection was less expressed. The Cro-Magnon benefited from large populations. As a result of the long-term negative social selection their groups were integrated well enough. Due to their population Cro-Magnons unity destroyed the Neanderthals. Against the mass of mediocrity even the strongest genius can not do anything. In the end, we left on this planet alone. As this story shows, for the socialization the large brain is not needed. Well socialized stupid individual is integrated into any community much better than any individualist. During the evolution the personal talents and characteristics were sacrificed for biological advantages: food, breeding, dominance. This is the price paid by humanity!”.