Im not sure if this helps but when i looked it up i got The Advent of law, prerequisites and implications. Laws that were created by Hammurabi of Bablonian in the mid century 18th century and placed on stone tablets for all to see.
His official title would have been the Chancellor of the German Reich, but what he was mostly known as, probably what you’re looking for, would be the German Führer. Führer translates to Leader or Guide.
Answer: The rise and popularity of radio caused a new approach in advertising
