The order have always known that humans are easily convinced of doing things that they are not even aware of. This has led to a lot of experiments that the order are doing to see just how much influence they can have in humans without directly telling them what to do. The order have been hiding messages in song lyrics that have successfully made humans do certain things in herd levels. We say herds because all hidden messages that work have been known to only work when at least hundreds of humans act on them.
The chain reactions that allow humans to start acting like a pack of zombies that has been told what to do, is the key element needed in order to control them. Further experimentation has also led humans to buy certain products or vote for a certain political figure, but lately the order have stopped doing these experiments to avoid having too much influence in human evolution.