ABSTRACT
I believe we are concerned in this symposium with complex social organizations and thus may disregard aggregations which show only limited coordination and integration. Integrated social organizations are characterized by the following attributes: The members have a complex system of communication; they often have a division of labor based on specialization for role; and the members show a cohesion or tendency to remain together. Some groups may show seasonal changes in composition. In highly social forms a member may be involved with the same set of adult companions for its entire life. Finally, there is a tendency for the group to be relatively impermeable to nonrelated conspecifics (Eisenberg, 1966).
