I’ll go deeper still. It’s why we’re social animals. Trust is the foundation of secure relationships and secure relationships keep us safe. Cities wouldn’t exist if it were every man for themself.

Yeah, for sure I believe that cities, walls, friendships, food chains, economies, armies, language… this all rests on meeting the basic human needs of shelter (security from elements and hostile actors), food (security from starvation), community (security of a support network).