Formal vs Material Cooperation.
Structures of sin in society. Creating and sustaining a structure of sin.
What does it take to create and sustain a structure of sin? How do we cooperate with structures of sin? Why has abortion been legal in the United States for 38 years? Are we cooperating with this structure of sin by simply going about our lives and not starting a revolution?
From the Catechism of the Catholic Church:
1869 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."144