Great post! I agree; without trust there would be no friendships or even marriages - it is that important in maintaining a relationship.
I think that if we didn't have the ability to trust others, then we likely wouldn't have the ability to see through those folks who are not trustworthy as well.
I trust my inner radar to try to see through people. But indeed life is built on trust from the moment we are born, but it’s taken advantage of way to many times.