Feenberg’s Questioning Technology is a foundational text in the philosophy of technology because it refuses the false separation between technical systems and democratic life. Feenberg argues that technology is not merely a neutral tool applied after society has made its decisions; it is one of the media through which society is organised. Design distributes agency. Interfaces assign roles. Standards determine access. Infrastructures stabilise certain behaviours and make others costly, irrational or invisible. The book’s central contribution is the concept of “democratic rationalisation”: technical systems can be redesigned through the claims, resistances and situated knowledges of users, workers and affected publics. Feenberg critiques two dominant positions: technological determinism (technology drives society) and instrumentalism (technology is neutral). Instead, he proposes a critical theory of technology that treats technical codes as crystallised social values. The book examines case studies from medicine, education, urban planning and computing to show how design choices embody power relations. Feenberg is not anti-technology; he is anti-enclosure. His work provides a vocabulary for understanding how technical politics works and how democratising interventions are possible. For anyone working on infrastructure, design, urbanism or digital platforms, Questioning Technology is indispensable.