I’ll give you an example, I live in rural Utah and more than once walked into a store and bought something and left money on the counter when there were no employees in the store. Or, as a pilot I’ll fly into an airport and the keys to a courtesy car will be on a table in the lounge with a note to fill up the gas tank.

High trust society is one where people do the morally right thing even if they wouldn’t get caught. To do have that you need a set of common societal values.