Functionalism is the oldest, and still the dominant, theoretical perspective in sociology and many other social sciences. This perspective is built upon twin emphases: application of the scientific method to the objective social world and use of an analogy between the individual organism and society. The emphasis on scientific method leads to the assertion that one can study the social world in the same ways as one studies the physical world. Thus, Functionalists see the social world as "objectively real," as observable with such techniques as social surveys and interviews. Furthermore, their positivistic view of social science assumes that study of the social world can be value-free, in that the investigator's values will not necessarily interfere with the disinterested search for social laws governing the behavior of social systems. Many of these ideas go back to Emile Durkheim (1858-1917), the great French sociologist whose writings form the basis for functionalist theory (see Durkheim 1915, 1964); Durkheim was himself one of the first sociologists to make use of scientific and statistical techniques in sociological research (1951). The second emphasis, on the organic unity of society, leads functionalists to speculate about needs which must be met for a social system to exist, as well as the ways in which social institutions satisfy those needs. A functionalist might argue, for instance, that every society will have a religion, because religious institutions have certain functions which contribute to the survival of the social system as a whole, just as the organs of the body have functions which are necessary for the body's survival. This analogy between society and an organism focuses attention on the homeostatic nature of social systems: social systems work to maintain equilibrium and to return to it after external shocks disturb the balance among social institutions. Such social equilibrium is achieved, most importantly, through the socialization of members of the society into the basic values and norms of that society, so that consensus is reached. Where socialization is insufficient for some reason to create conformity to culturally appropriate roles and socially supported norms, various social control mechanisms exist to restore conformity or to segregate the nonconforming individuals from the rest of society. These social control mechanisms range from sanctions imposed informally--sneering and gossip, for example--to the activities of certain formal organizations, like schools, prisons, and mental institutions. You might notice some similarities between the language used by functionalists and the jargon of "systems theorists" in computer science or biology. Society is viewed as a system of interrelated parts, a change in any part affecting all the others. Within the boundaries of the system, feedback loops and exchanges among the parts ordinarily lead to homeostasis. Most changes are the result of natural growth or of evolution, but other changes occur when outside forces impinge upon the system. A thorough-going functionalist, such as Talcott Parsons, the best-known American sociologist of the 1950s and 60s, conceptualizes society as a collection of systems within systems: the personality system within the small-group system within the community system within society (Parsons 1951). Parsons (1971) even viewed the whole world as a system of societies. Functionalist analyses often focus on the individual, usually with the intent to show how individual behavior is molded by broader social forces. Functionalists tend to talk about individual actors as decision-makers, although some critics have suggested that functionalist theorists are, in effect, treating individuals either as puppets, whose decisions are a predictable result of their location in the social structure and of the norms and expectations they have internalized, or sometimes as virtual prisoners of the explicit social control...
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