Groupthink

Irving Janis's concept describing a mode of thinking where the desire for group harmony and conformity overrides realistic appraisal of alternatives—producing irrational or dysfunctional decisions. Groupthink symptoms: illusion of invulnerability, collective rationalization, belief in the group's moral superiority, stereotyping of out-groups, pressure on dissenters, self-censorship, illusion of unanimity, and self-appointed 'mind guards.' Bay of Pigs, Challenger disaster, and corporate scandals consistently trace back to groupthink dynamics where dissent was suppressed and the group converged on catastrophically wrong decisions.

When to use it

When team decisions feel unanimously obvious (unanimity is a groupthink warning sign); when dissenting voices have gone quiet; when the team is cohesive, under pressure, and led by someone with strong opinions; when past decisions produced by group consensus turned out to be catastrophically wrong.

How it can help

Build structural protections against groupthink: assign a devil's advocate role (rotating), solicit anonymous input before group discussion, invite outside perspectives regularly, have leaders speak LAST (not first), and explicitly reward disagreement. The most important practice: create a norm where questioning the group consensus is treated as a contribution, not a threat. Groupthink is strongest in cohesive groups with a directive leader under pressure—exactly the conditions that describe most high-stakes business decisions.