Secondly, the action and hence the risks are avoidable: one does not have to engage in trade with another firm (although this implies forgoing the potential benefits of trade). Being able to avoid the relation is fundamental. If you could not, you might say something like: 'I have no choice but to trust this person, institution, etc.' Clearly, there being no choice, we need not invoke trust to explain our behaviour. Of course, as Luhmann (this volume) points out, whether or not a relation is seen to be avoidable is often highly subjective, and presumably varies in accordance with the structure of institutions and political power.

Diego Gambetta, Trust - Making and Breaking…, loc. 2509