Not sure yet, curious to reflect on it more.
But initial take is that some environments people trust each other more. Trusting intentions, actions, words, ability. For example, a low-trust environment would probably be most prisons. High-trust might be a neighborhood where people don't lock their doors.
I remember reading a World Bank economist saying that we might be able to explain the difference in GDP per capita between the US and a place like Somalia based on how much people trust each other. How mistrust can add so much friction to interactions.