Trust was historically bound to friendship, not just narrow intimacy

Evidence

I wish to suggest that Trust has been historically associated with the notion of friend. Modern usage restricts the number of our friends to a narrow circle of intimates, narrower by far than those whom we might occasionally be inclined to trust. But among the Frafras of my study — and perhaps for medieval Englishmen — trust was closely bound up with an idiom of classificatory friendship which had a relatively broad range of application. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 2415

Categorization

• XREF: The Frafra case of broad classificatory friendship as a trust substrate parallels the familiarity/observability baseline in Luhmann that blindness destroys.