Answer:
Through propaganda.
Step-by-step explanation:
They "brainwash" their own citizens in order for them to comply to their own government, often limiting the news they can view or hear and learn so that they do not have any "influence" on their individual thinking. They have propoganda advertisements and new sites that only promote what is "good' and anyone who says anything bad will be punished, causing people to become silent in order to escape persecution.