• Thought patterns characterized by self-deception, forcing conformity to group values
• Someone who abandons personal critical or cynical thinking and reasoning to rely on a group to decide what is morally and ethically correct
• Often a forced state that includes the use of hegemony as a tool for conformity to the groupthink
• The discouragement of individuality and creativity within a group
First used in 1952, then further developed by social psychologist Irving Janis in 1972 to describe bad decision-making force upon an individual by a group.