The Great Commoner--for his ability to connect to the common man.
William Jennings Bryan had an ability to speak but also connect to the ordinary American person. He connected to the rural communities and eventually became the leader of the Populist Party and the Democratic Party. He believed in fundamental Christianity, temperance, farming, the common people.
The Greeks. I cannot recall what they were called then.
Because hoover feared that intervention with the stock market would cause panic.
The fertile river Valley between the Tigris and Eufrades rivers if that what you mean.