The Concept of “Stress” in the Biological and Social Sciences

Abstract

The concept of “stress” was applied to biological and social systems in the first half of this century because it appeared to provide an explanation for the apparently “non-specific” effects of biologic agents, and for the occurrence of illness as a part of the response of people to their social environment. Evidence subsequently accumulated has confirmed that a large proportion of the manifestations of disease are produced by reaction of the host and not directly by the “causal agents” of disease, and that the components of the host's reactions are not in themselves “specific” to any given “causal agent”; it has confirmed that reactions of people to other people, or to the social environment may influence any physiological process or any disease; but it has also indicated that the concept of “stress” does not provide an adequate explanation for these phenomena. Living organisms are highly ordered and complex biological organizations that maintain themselves precariously over a limited period of time by the interchange of energy and information with the environment. Their reactions to the environment are complex and highly ordered, are based upon information, and are communicative and “logical” in nature. Although the components are “not specific,” the reactions themselves may be highly specific to the stimulus that initiates them. These reactions are not random but are “directed” (apparently “purposeful”) and tend to preserve the integrity of the organism, and the integrity of its relation to its social group and to its environment. The concept of “stress,” which was derived partly from popular usage, and based upon 18th and 19th century mechanical models of “force,” “counterforce,” and “distortion,” does not provide a meaningful scientific description of organism-environment relationships. These are better described by other concepts. The “stress concept” was heuristically valuable in the past, but it is no longer necessary, and it is in some ways hampering at the present.