Albert Bandura

Albert Bandura is a psychologist born in 1925. He came up with a theory called the 'Hypodermic syringe model' which is a theory that represents how the media can indoctrinate people directly. 
it describes how the media can directly insert a message into somebody's mind and they will happily except that to be correct. Some examples of this model was shown in Nazi propaganda during World War 2 to make people believe that the minorities were not as good as the aryans etc. 
It brings the idea forward that the media can be very powerful in getting their intended messages - good or bad - directly into our thoughts and perceptions.