Philosophers / Contemporary Western
Thomas-kun
United States 1922-07-18 ~ 1996-06-17
American historian and philosopher of science (1922-1996). The Structure of Scientific Revolutions (1962) introduced "paradigm shift" — now an English idiom — and showed science advances by revolutions, not accumulation.
What You Can Learn
Kuhn's paradigm shift is the most-invoked philosophical framework in modern business. Christensen's Innovator's Dilemma is Kuhn applied to firms: the more a company has optimized to a dominant paradigm, the harder the move to a new one. AI labor shifts and remote work all yield to Kuhnian reading. Incommensurability illuminates ideological gaps: two camps using the same words for different things cannot be reconciled by argument alone. "Theory-ladenness" grounds cognitive bias research.
Words That Resonate
A scientific revolution is a non-cumulative developmental episode in which an older paradigm is replaced in whole or in part by an incompatible new one.
Normal science does not aim at novelties of fact or theory and, when successful, finds none.
The proponents of competing paradigms practice their trades in different worlds.
What a man sees depends both upon what he looks at and also upon what his previous visual-conceptual experience has taught him to see.
Life & Legacy
Thomas Samuel Kuhn (1922-1996) is the American historian and philosopher of science whose 1962 The Structure of Scientific Revolutions changed how the educated public talks about science, and put "paradigm shift" into every English speaker's vocabulary.
Born in Cincinnati to a German Jewish family, Kuhn grew up in New York at progressive schools that prized independent thinking. He went to Harvard for physics, taking his bachelor's in 1943, master's in 1946, and PhD in 1949 under John Van Vleck.
His pivot from physicist to historian-philosopher of science came as a graduate student, when Harvard president James Conant recruited him to teach the new general education course in history of science. He held positions at Harvard, Berkeley (1956-64, in both history and philosophy), Princeton (1964-79), and MIT (1979-91). Structure was published from Berkeley in 1962.
The book makes three claims. First: science does not advance by linear accumulation but alternates between long stretches of "normal science" and rare "scientific revolutions" in which one paradigm replaces another. Second: competing paradigms are "incommensurable" — no neutral standpoint allows point-for-point comparison. Third: scientific perception is not pure observation; what scientists see is shaped by their paradigm.
The argument provoked a storm. At a 1965 London symposium Kuhn debated Karl Popper and the Popperians, an exchange later called "a Popperian thrashing of Kuhn." Lakatos and Feyerabend extended the dispute. The concept of paradigm escaped its scientific home and colonized social science, humanities, and business writing — far beyond what Kuhn intended; he later preferred "disciplinary matrix." Diagnosed with lung cancer in 1994, he died in 1996.
Expert Perspective
In late twentieth-century philosophy of science, Kuhn and Popper are the two great poles. Popper emphasized rational criticism producing incremental progress; Kuhn, social structures producing punctuated leaps. Their 1965 London exchange defined the field. Lakatos, Feyerabend, and Rorty descend from this dispute.
