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.