the.com/groupthink

means The tendency of a close-knit group to converge on a consensus decision without critically testing it, because preserving harmony and agreement feels more urgent than getting it right.

from Coined in the early 1970s by psychologist Irving Janis, who built it deliberately on the model of George Orwell's 'Nineteen Eighty-Four' coinages like 'doublethink' — Janis even noted the Orwellian echo was intentional, meant to flag a kind of mental conformity that erodes independent judgment. He developed the idea while studying real-world policy fiascos (his famous case studies include the Bay of Pigs invasion), arguing that tight, cohesive groups under pressure can silence dissent and overrate their own judgment. The word stuck because the concept named something everyone had seen but hadn't had a label for.