Repeated contact is just one mechanism, there are others that scale to country size. The end result is called a high trust society. https://en.wikipedia.org/wi

Repeated contact is just one mechanism, there are others that scale to country size. The end result is called a high trust society. https://en.wikipedia.org/wiki/High-trust_and_low-trust_societies https://en.wikipedia.org/wiki/High-trust_and_low-trust_socie... For example, Tokyo has a lot of people and they actively dislike interacting with strangers but if you leave your laptop unattended while peeing at a coffee shop, it's very unlikely to have been stolen.