The Structure of Scientific Revolutions by Thomas S. Kuhn

The Structure of Scientific Revolutions is one of the most cited and influential academic books ever published. Thomas Kuhn, a physicist and historian of science, overturned the conventional view of science as a steady accumulation of knowledge and replaced it with a more complex and realistic picture of how scientific progress actually works.

Kuhn introduces the concept of the paradigm — the set of assumptions, methods, and exemplary problems that define what normal science looks like within a given field at a given time. He argues that most scientific work is not revolutionary but rather puzzle-solving within an accepted paradigm, aimed at extending and elaborating the paradigm’s reach rather than questioning its fundamental assumptions.

The revolutionary part of Kuhn’s argument is his account of paradigm shifts — what he calls scientific revolutions. He shows that anomalies inevitably accumulate within any paradigm, observations and experimental results that cannot be explained by the existing framework. When the anomalies become too numerous or too significant to ignore, the scientific community undergoes a crisis that eventually resolves in a paradigm shift — the replacement of the old framework with a new one that can accommodate both the old successes and the new anomalies.

Kuhn argues, controversially, that paradigm shifts involve a form of incommensurability — scientists working within different paradigms are in some sense living in different worlds and cannot fully translate their ideas across the paradigm boundary. This argument about the sociology of science sparked enormous debate that continues to this day. The Structure of Scientific Revolutions permanently changed how scientists, philosophers, and historians think about scientific knowledge and its development.