PSYCHOLOGICAL CONCEPT
A group of smart people makes a terrible decision. Everyone knew it was a bad idea. No one spoke up. That is groupthink.
QUICK ANSWER
Groupthink is a phenomenon where a group of people makes bad decisions because they prioritize consensus over critical thinking. It was identified by psychologist Irving Janis in 1972. The Bay of Pigs invasion is a classic example. Groupthink explains why smart groups often make terrible decisions. It is a warning about the dangers of group pressure.
Groupthink is simple: groups prioritize agreement over truth. Everyone wants to get along. No one wants to cause conflict. So everyone agrees. Even when they know it is wrong.
The group becomes blind. They ignore evidence. They dismiss dissent. They make terrible decisions.
Encourage dissent. Assign a devil's advocate. Invite outside opinions.
CORE IDEA
Groupthink is simple: groups prioritize agreement over truth. Everyone wants to get along. No one wants to cause conflict. So everyone agrees. Even when they know it is wrong.
The group becomes blind. They ignore evidence. They dismiss dissent. They make terrible decisions.
The solution is to encourage dissent. Assign a devil's advocate. Invite outside opinions. The goal is truth, not harmony.
Irving Janis was a psychologist studying decision-making in groups. He analyzed the Bay of Pigs invasion, the Pearl Harbor attack, and other famous failures. He noticed a pattern: the groups were smart, but they made terrible decisions.
Janis called this groupthink. He defined it as a mode of thinking in which the desire for group harmony overrides realistic appraisal of alternatives. The group wants to agree. They do not want to rock the boat.
Today, groupthink is a foundational concept in psychology and business.
Groupthink became famous because it explains why smart groups make terrible decisions. The Bay of Pigs invasion, the Challenger disaster, and the financial crisis all involved groupthink.
The concept was popularized by Janis's research. It is widely taught in business schools.
Today, groupthink is a foundational concept in organizational psychology.
The Bay of Pigs invasion is the classic example. The group was smart. They made a terrible decision. Groupthink was the cause.
A board of directors makes a bad decision. Everyone knows it is bad. No one says anything. Groupthink is the cause.
A group of friends makes a bad plan. Everyone knows it is bad. No one says anything. Groupthink is the cause.
An online community agrees on something ridiculous. No one dissents. Groupthink is the cause.
CONCEPT MAP
Groups suppress dissent and drift into poor decisions.
Everyone privately doubts but publicly agrees.
Authority pressure can silence disagreement.
Groups can filter evidence collectively.
People infer truth from group behavior.
Bandwagon Effect points back to this idea in the concept network.
No. It happens in smart groups too. Smart groups are often more vulnerable because they are confident.
No. The dynamic is subconscious. People do not realize they are conforming.
You cannot eliminate it. You can only manage it. Encourage dissent. Assign a devil's advocate.
Groupthink is a powerful concept, but it has limitations. Not every group agreement is groupthink. Sometimes the group is right.
The concept can be overused. Not every bad decision is groupthink. Sometimes the group is just wrong.
The concept is a heuristic, not a law. It is a guide, not a rule.
Encourage dissent. Assign a devil's advocate. Invite outside opinions.
Be aware of group pressure. Do not assume agreement means correctness.
Create psychological safety. People need to feel safe to disagree.
EXPLORE NEXT
Everyone privately doubts but publicly agrees.
Everyone privately doubts but publicly agrees.
Authority pressure can silence disagreement.
Authority pressure can silence disagreement.
Groups can filter evidence collectively.
Groups can filter evidence collectively.
People infer truth from group behavior.
People infer truth from group behavior.
Bandwagon Effect points back to this idea in the concept network.
Bandwagon Effect points back to this idea in the concept network.Groups prioritize agreement over truth. Everyone wants to get along. No one wants to rock the boat. Bad decisions follow.
The Bay of Pigs invasion is the classic example. Smart people made a terrible decision because they did not want to disagree.
Encourage dissent. Assign a devil's advocate. Invite outside opinions. Create psychological safety.
It leads to bad decisions. The group prioritizes harmony over truth. Critical thinking is suppressed.