ABSTRACT
In early human societies social groups were mainly based on space. A social group was a set of individuals who tended to live close together in the same local environment. Physical nearness made it possible to interact socially and to develop social structure inside the group. It is only with the development of transportation technologies and, especially, the huge development of communication technologies in the twentieth century, that space has lost some of its importance in determining who is interacting with whom and, therefore, the nature of human groups.
