 It was during the twentieth century that talk of scientific revolutions slowly gained currency. One can find scientists using the term occasionally. For example, young Einstein, in a letter to his friend Habicht, describes his new paper on light quanta as “very revolutionary” (Klein 1963, 59). The idea of radical breaks was foreign to such historians of science as Pierre Duhem and George Sarton, but Alexandre Koyré, in Études Galiléennes (1939), rejected inductivist history, interpreting the work of Galileo as a sort of Platonic intellectual transformation. (See Zambelli (2016) for a revealing account of Koyré’s own background.) In The Origins of Modern Science: 1300–1800 (1949 and later editions), widely used as a course text, Herbert Butterfield, a political historian working mainly from secondary sources, wrote a compact summary of the Scientific Revolution, one that emphasized the importance of conceptual transformation rather than the infusion of new empirical information. The anti-whiggism that he had advocated in his The Whig Interpretation of History (1931) became a major constraint on the new historiography of science, especially in the Anglophone world. In Origins, Butterfield applied the revolution label not only to the Scientific Revolution and to several of its components but also to “The Postponed Revolution in Chemistry” (a chapter title), as if it were a delayed component of the Scientific Revolution. His history ended there. A revolution for Butterfield is a major event that founds a scientific field. Taken together, these revolutions founded modern science. As the title of his book suggests, he was concerned with origins, not with what comes after the founding. In the Introduction he famously (or notoriously) stated that the Scientific Revolution