ABSTRACT
This chapter begins with the study of the internal system—the elaboration of group behavior that simultaneously arises out of the external system and reacts upon it. It focuses on the Bank Wiring Observation Room. The chapter examines the internal system as exemplified in the behavior of the group as a whole. It deals with a single social unit, the Bank Wiring group, rather than the subgroups within this unit. The chapter also examines the three main elements of group behavior: activity, sentiment, and interaction. It shows the mutual dependence of sentiment and activity most easily in the wide web of helping. The chapter describes the appearance of new co-operative activities undertaken by the group as a whole. It defines norms as the expected behavior of a number of men. Norms do not materialize out of nothing; they emerge from ongoing activities.
