The Politics of Paradigms shows that America’s most famous and influential book about science, The Structure of Scientific Revolutions of 1962, was inspired and shaped by Thomas Kuhn’s political interests, his relationship with the influential cold warrior James Bryant Conant, and America’s McCarthy-era struggle to resist and defeat totalitarian ideology. Through detailed archival research, Reisch shows how Kuhn’s well-known theories of paradigms, crises, and scientific revolutions emerged from within urgent political worries-on campus and in the public sphere-about the invisible, unconscious powers of ideology, language, and history to shape the human mind and its experience of the world.