A list of the most important rights to citizens or inhabitants of a country. The purpose is to protect these rights, and the bill of rights reinforces them.
For ex)
If someone were to disobey a law or principle, the only way to know is to have the law written down so everyone knows it (adults). Not writing something down, or not making it clear, people will not know how to react when they are charged for something they did not know was illegal.
The posters encourage average Americans to contribute to the war effort because it gave them drive to support United States in victory, "poster was an ideal agent for making victory the personal mission of every citizen".
