The Structure of Scientific Revolutions

by Thomas Kuhn · 1955

Thomas S. Kuhn's seminal work, *The Structure of Scientific Revolutions*, argues that scientific progress is not a steady, cumulative process but occurs via periodic, transformative revolutions that replace one paradigm with another. First published in 1962, the book introduced the concepts of "normal science," "paradigm," and "incommensurability," reshaping the philosophy and history of science. The 50th‑anniversary fourth edition (April 2012) adds an introductory essay by Ian Hacking that clarifies Kuhn's terminology and applies his ideas to contemporary scientific fields, offering a refreshed index and expanded commentary for new generations of readers.