Thomas Kuhn

Thomas Samuel Kuhn (1922–1996) was an American historian and philosopher of science. Trained as a physicist, he turned to the history of science while working on Copernicus and the Aristotelian tradition. His book The Structure of Scientific Revolutions (1962) introduced the concepts of normal science, paradigm, and scientific revolution, and it became one of the most influential works of twentieth-century philosophy of science. He taught at Harvard, the University of California at Berkeley, and the Massachusetts Institute of Technology, and his ideas remain central to debates about scientific change and rationality.