Over the last couple of years, I've been collecting passages that touch on this point. I'm always surprised when I come across them. Two of my favorites that I've randomly come across (and from non-political books):
>It would be in the interest of kings, czars, nobles, and so forth that the masses be educated in a way that renders them slavelike in mentality. The language of wrongness, should, and have to is perfectly suited for this purpose: the more people are trained to think in terms of moralistic judgments that imply wrongness and badness, the more they are being trained to look outside themselves—to outside authorities—for the definition of what constitutes right, wrong, good, and bad. When we are in contact with our feelings and needs, we humans no longer make good slaves and underlings. [0]
>...the very media we have mentioned are so designed as to make thinking seem unnecessary (though this is only an appearance). The packaging of intellectual positions and views is one of the most active enterprises of some of the best minds of our day. The viewer of television, the listener to radio, the reader of magazines, is presented with a whole complex of elements — all the way from ingenious rhetoric to carefully selected data and statistics — to make it easy from him to “make up his own mind” with the minimum of difficulty and effort. But the packaging is often done so effectively that the viewer, listener, or reader does not make up his own mind at all. Instead, he inserts a packaged opinion into his mind, somewhat like inserting a cassette into a cassette player. He then pushes a button and “plays back” the opinion whenever it seems appropriate to do so. He has performed acceptably without having had to think. [1]
[0] "Nonviolent Communication" by Marshall B. Rosenberg
[1] "How to Read a Book" by Mortimer J. Adler