The Essential Tension: Selected Studies in Scientific Tradition and Change.

The Essential Tension (1977) is a landmark collection of essays by Thomas S. Kuhn (1922–1996), the Laurance S. Rockefeller Professor of Philosophy at the Massachusetts Institute of Technology and one of the most consequential philosophers of science of the twentieth century. Best known for his 1962 work The Structure of Scientific Revolutions - which introduced the now-ubiquitous concept of the paradigm shift and fundamentally altered the way the scientific community understands its own history and development - Kuhn here gathers previously published essays alongside two unpublished articles and a partly autobiographical preface. The title essay, originally delivered as a lecture in 1959, encapsulates Kuhn's central argument: that scientific progress depends not on pure innovation but on a productive and necessary tension between tradition and discovery - the committed practitioner of normal science, trained within an existing paradigm, is paradoxically the most likely agent of revolutionary change.