In 2019, economists handed in more than 17,000 “lost” wallets at banks, hotels and museums in 355 cities across 40 countries. Each held a business card with an email address. Without cash, 40% were reported to their owner; with about $13 inside, 51%. The pattern held in almost every country, which the experts surveyed had not predicted. Keeping the money means seeing yourself as a thief.
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.