It works mainly because the audience was 'educated', and part of this process lets the power instill its 'values' into youngsters' brains. In most of the Weste

It works mainly because the audience was 'educated', and part of this process lets the power instill its 'values' into youngsters' brains. In most of the Western World and a not-so-distant past some Christian Church was in charge of this, and we had Crusades, clerics baptizing guns... The main cause may be the will to 'enhance' the populace by using education in order to inoculate values. We may escape by only teaching fundamentals (either politically neutral or boosting a critical mindset). Letting a central power mix proper education with its messages leads to total war.