They understood cultural change. If we look for past examples of changes in culture of the American people, we only have to look as far as the children. In California, when that State wanted to change the earthquake preparedness culture, they started with the children. Duck, Cover and Hold became part of the lesson plans in the schools and practiced on a regular basis. The school children brought this home to the parents and families.
Seat belts are another example of culture change.
I can remember when I first began wearing a seatbelt. I had picked up my 10 year old son at school one day. He got in the car and buckled his seatbelt. As we began to drive away he turned to me and said, Better put on your seatbelt . I did not teach him that, he learned it in school, and he taught me.