Groupthink
Groupthink is a pattern in which a close-knit group’s desire for harmony and agreement overrides realistic assessment of options, so members suppress doubts and reach a poor decision without critically examining it.
- 1 min read
- 6 linked ideas
Why does groupthink happen?
Cohesion feels good and dissent feels costly. In a group with a strong leader, shared identity and time pressure, members begin to censor their own reservations, read silence as agreement and treat outside critics as uninformed. A sense of invulnerability and moral rightness grows, while warning signs are explained away. Irving Janis, who developed the idea, described members who shield the leader from unwelcome information. The result is not stupidity but a social process that stops a capable group from using the knowledge it already has.
What does groupthink look like in real life?
- Janis’s central case: the 1961 Bay of Pigs invasion, approved by a talented advisory team that failed to challenge weak assumptions.
- A product team ignoring early customer complaints because everyone is invested in the launch date.
- A board waving through a risky acquisition after the chair signals enthusiasm in the first minute.
How do you counter groupthink?
- Have the leader hold back their own view until others have spoken.
- Assign a rotating devil’s advocate whose explicit job is to argue against the plan.
- Invite an outsider with no stake in the decision to review it before it is final.
Frequently asked
- What is groupthink in simple terms?
- It is when a group cares more about getting along than getting it right. People keep their doubts to themselves, the group mistakes silence for consensus, and a flawed plan goes ahead unchallenged.
- Who came up with groupthink?
- The word was coined by William H. Whyte Jr. in Fortune magazine in 1952. The psychologist Irving Janis turned it into a theory of failed group decisions in his 1972 book, using cases such as the Bay of Pigs invasion.
- What are the symptoms of groupthink?
- Janis listed signs such as an illusion of invulnerability, unquestioned belief in the group’s morality, stereotyping of outsiders, self-censorship, an illusion of unanimity, pressure on dissenters and members who filter out unwelcome information.
- What is the difference between groupthink and the Abilene paradox?
- In groupthink, members come to adopt the group view and play down their own doubts. In the Abilene paradox, members privately keep their disagreement but wrongly believe they are alone in it, so nobody speaks up.
Keep reading
Antifragility
Surviving chaos is the lesser skill; some things grow stronger because of it.
The books behind better thinking
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Prefer to read? The canonical picks:
- Thinking, Fast and Slow — Daniel Kahneman
- The Art of Thinking Clearly — Rolf Dobelli
- The Great Mental Models, Volume 1 — Shane Parrish
- Poor Charlie’s Almanack — Charlie Munger
- Super Thinking — Gabriel Weinberg & Lauren McCann
- Seeking Wisdom — Peter Bevelin
Cite this page
ReadGlobe. (2026). Groupthink. https://readglobe.com/bias/groupthink/
"Groupthink." ReadGlobe, 24 Oct. 2026, readglobe.com/bias/groupthink/.
Editorial synthesis © ReadGlobe 2026, drawing on Kahneman’s Thinking, Fast and Slow, the Tversky–Kahneman research program, and the primary cognitive-science literature. · Last reviewed 2026-10-24.