Sin is a personal act. Moreover, we have a responsibility for the sins committed by others when we cooperate in them:
– by participating directly and voluntarily in them;
– by ordering, advising, praising, or approving them;
– by not disclosing or not hindering them when we have an obligation to do so;
– by protecting evil-doers.
Thus sin makes men accomplices of one another and causes concupiscence, violence, and injustice to reign among them. Sins give rise to social situations and institutions that are contrary to the divine goodness. “Structures of sin” are the expression and effect of personal sins. They lead their victims to do evil in their turn. In an analogous sense, they constitute a “social sin.”