Sociology, Concepts of Group Behaviour

Sociology as a social science refers to the systematic study of the development, structure, and functioning of society. In the last two centuries sociologists analysed many facets of their own societies, in the more general context of observing the causes and consequences of the transition from traditional pre-industrial life to modern societies.
The fundamental postulate of sociology is that human beings act not by their own free decisions taken rationally, but under the influence of history and culture, and the expectations and demands of others: human beings are both the products and the makers of their societies.
During the 20th century, sociologists have been particularly interested in the influence of role, status, class, and power on experience and behaviour, in the family and in the community; in the factors which contribute to cohesion and conflict; in social structure and social stratification; and in social problems such as crime, drug addiction, and domestic violence.