One example is no fault divorce. This is what raised the divorce rate. Making things much harder to do is much more effective as a structure than magically changing minds. People behave according to consequences more than according to their own beliefs. Abortion is another example. Before the 70s there were so few of them because it was illegal. It skyrocketed after it started to become legal in different states. Moral of the story? Laws are more important than beliefs in enforcing behaviors.