Art And Social Change - Again

I've been asked why and how art could change the world, could change society.
The problem here is what I call the "Western Art Anomaly"; because in other cultures, both in different times and different locations, people were and are aware that art could change society - it could change a lot (for example kings that arrested artists; because they know their art could cost them their crown. Priests that persecuted artists; because they knew their art could cost them their power).

But in contemporary western society, it is is no longer understood what art is. They think, art, music, movies, that is something you "consume" in your pastime and you have fun with it and maybe dance to it or chill-out or whatever, and you pay money for it and it gives you a good time, and maybe, just maybe, some deep thoughts too!
The common western person behaves like cavemen who discovered a working spaceship; but they don't understand how to fly it, so they just use it to climb on it and jump down from it and think, hey this is a good time.
So what is art exactly? Art is "it". It's the thing. It's the holy grail, it could take you to the stars - metaphorically speaking. Art is where the sky and earth meet. It's the base of society, of politics, and civilization, but it goes beyond them. It is a cultural code that programs society. If you change this code, you can change society.
It's no wonder "culture" both is a word for art, as well as for organized human society. Culture as art leads the "culture", the society. Art sets the model of politics, of society, of everything, and society and politics follow this model.
Just think about it. The Rock'n'Roll singers had more impact on western society in the 20th century than any single politician. If a politician calls for a political rally, or movement, or action, or a pop star calls for it, who will have more followers in most of cases?
Art is the very source of society and philosophy and language and virtually everything. It is the one thing. The main thing.
Because of this, art *has* the power to change society. And it will change society. How do you use art this way? Easy. Just give art an edge that other art doesn't. Make it big, make it good. But most importantly, don't fall for money and fame, not even "underground fame". Make it true. And be true.
And change will follow.