Should the great powers still want to try (or already do) dominate the minds of people?
Various designs of subliminal advertising have been tested and made by governments.
Since subtle ways in the construction of images to something more sophisticated, with advanced equipment.
Everything to instill in the minds certain states of consciousness for people to act so that the drivers wanted.
We see it every day in business marketing, advertising broadcast on television channels, billboards, radio. All these channels are used to pass a hidden message in the main project, but most go unnoticed because the subliminal advertising is only perceived by the subconscious, which is precisely the most powerful and most impressionable of our mind.
Feelings of patriotism or general emotion, can be instigated by these subliminal advertising.
Both the great leaders have always on your team of advisors, people with extensive knowledge of marketing and psychology. Well, you know how to create the ideas necessary to control the minds of most people, which in turn saw staunch these ideas. And people who have been subjugated to the ideas instilled so subliminal, eventually serving as support, as they try to get the message out to people who were not affected by propaganda. So they can quickly reach millions of people and can direct them as they please.
Here we have an efficient control of crowds. Old and practical.
Think about that next time you pass by a billboard advertising innocent, or that cute commercial on television and repetitive.