Applied psychology
In 1941 Charles Chaplin parodied Adolph Hitler at the peak of his power in The Great Dictator. There's a scene where his Hynkel (Hitler) receives advice from his henchman Garbitsch (Goebells) about how to deal with someone who was coming to see him at a meeting. That someone Napoloni (Mussolini) made Hynkel nervous and Garbitsch [...]