Cooperation collapses if no one will knowingly take the dependent role.

Evidence

The question for social theory is: what motivations do there need to be for there to be cooperation? That is the question to which the remarks in the third section are meant to contribute. One thing is immediately obvious: there will not be any cooperation if the only general motives there are for joining cooperative ventures are such that no one can (knowingly) be the dependent party. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 169

Categorization

• XREF: This is the core causal claim the reader is testing against Blindness — when blindness makes everyone dependent but the dependents can’t monitor their betters (or each other), a society of universal mutual dependence plus unobservable defection forms.