Trust relationships find a favourable soil in social contexts with the same kind of structure, i.e. characterized by the relative persistence of the relationship, by reciprocal dependencies, and a certain quality of the unforeseen. The overriding consideration is the law of meeting again. The participants will have to go on seeing each other. This makes it more difficult for trust to be breached, at any rate when any breach could not be hidden from the partner or acceptable excuses offered.

Niklas Luhmann, Trust and Power, loc. 181