Thomas Kuhn was born on July 18, 1922, in Cincinnati, Ohio, and grew to become one of the most influential thinkers in modern science. Trained as a physicist, he shifted toward the history and philosophy of science, exploring how scientific ideas evolve over time. His work challenged the assumption that scientific progress is steady, linear, and predictable.
In 1962, Kuhn published The Structure of Scientific Revolutions, introducing the term “paradigm shift.” He argued that scientific fields undergo sudden, transformative changes when old frameworks collapse and new ones emerge. To illustrate how perception itself can flip, he referenced the famous 1899 “duck‑rabbit” drawing — a simple image that reveals how dramatically interpretation can shift with a change in perspective.
Kuhn’s July 18 birthday marks the arrival of a scholar whose ideas reshaped not only science, but the way Americans understand innovation, progress, and intellectual revolutions. His work continues to influence fields from physics to sociology to business strategy.
Image via Wikimedia Commons, public domain
