The concept of groupthink was developed by?

The concept of groupthink was developed by social psychologist Irving Janis in the early 1970s. He introduced the term to describe a psychological phenomenon where the desire for harmony and conformity within a group leads to poor decision-making and a lack of critical evaluation of alternatives. Janis identified several symptoms of groupthink, such as self-censorship and the illusion of unanimity, which can hinder effective problem-solving. This concept has since been widely applied in various fields, including management, politics, and behavioral science.