In the 1920s and 1930s, high-culture artists, composers, and writers dismantled traditional cultural norms and expressed the anxiety and fear arising out of the First World War and its aftermath. What about the new media (radio and movies): in what way(s)

In the 1920s and 1930s, high-culture artists, composers, and writers dismantled traditional cultural norms and expressed the anxiety and fear arising out of the First World War and its aftermath. What about the new media (radio and movies): in what way(s) were they used by propagandists and political leaders? To convey what message(s)?