In 1969, Serge Moscovici showed groups of six people 36 slides, all blue in varying shades. Two confederates consistently called them “green.” About 8% of the real participants' answers then turned to “green,” and nearly a third of them said it at least once. When the confederates wavered, the effect dropped to about 1%. Unlike majority pressure, minority influence works mainly through consistency.
Remembering is not replaying a recording — it is rebuilding. Each time you recall a memory, it becomes temporarily malleable and can be altered before being stored again. That is why two people can sincerely remember the same event… differently.
In 2003, Johnson and Goldstein compared European countries. Where you must tick a box to become a donor, consent rates ranged from 4% to 28%. Where you're a donor by default unless you opt out, they topped 85%. People aren't more generous on one side; most simply stick with whatever option was chosen for them.