What was the primary goal of propaganda art?

The average natural born citizen in any country is continuously indoctrinated into the national culture starting about the time they begin understanding the meaning of Words. There's one country in particular where reality is staring the public in the face, but the truth has been grossly distorted for decades by government, and mass media, bias and Propaganda. If the citizens would suddenly see the truth, instead of what they've been conditioned to believe, they would find themselves in a strange and bizarre foreign land that's contrary in many ways to their personal beliefs regarding home.