Abstract
Democratic societies are rife with talk of trust in institutions such as governments, banks, news agencies, medical practitioners, nuclear power plants, weather forecasters and social network sites. These institutions are anonymous in the sense that citizens tend to know very little about them. Philosophers have argued that trust in the absence of sufficient evidence may fit a child who trusts its parents but is inappropriate for the vigilant citizens of a democratic society. In this article, I defend the appropriateness of trusting anonymous institutions against its critics. To this end, I develop two principles of appropriateness that apply to a wide range of trusting attitudes. First, the principle of epistemic duties according to which the truster should not be culpably ignorant about the trustee, where, what constitutes culpable ignorance will depend on the relationship of trust. Second, the principle of appropriate normative expectations according to which a truster should have normative expectations that fit the relationship with the trustee and the valued outcome at stake in the trust relation. I then show that it is often appropriate to trust anonymous institutions. In fact, the evidential requirements on trust are sometimes so low as to allow citizens to trust institutions which they know literally nothing about.