Middle-Range Theory

Middle-range theory is a methodological proposal made by the sociologist Robert K. Merton in his 1949 book Social Theory and Social Structure, describing a style of sociological theorizing that sits between two extremes Merton considered inadequate on their own. At one extreme are minor working hypotheses, narrow generalizations about a single limited finding with little broader explanatory reach, and at the other extreme are grand, all-encompassing theoretical systems that attempt to explain the whole of social life within a single unified framework, of the kind Merton associated with theorists such as Talcott Parsons. Merton argued that sociology would advance more reliably by concentrating on theories of the middle range: theories addressing specific, clearly delimited aspects of social phenomena, such as reference group behavior, role conflict or the self-fulfilling prophecy, that are precise enough to be tested against empirical evidence while still being general enough to apply across more than one particular case. Merton intended middle-range theory partly as a direct corrective to what he saw as the premature ambition of grand theorizing, which in his view often outran the field's actual empirical evidence, while also avoiding a purely descriptive, fact-gathering sociology with no theoretical ambition at all. The concept has remained influential as a way of describing a great deal of ordinary empirical sociological research, which typically aims at exactly this middle level of theoretical generality.