Shinto does not have a founder nor does it have sacred scriptures like the sutras or the Bible. Propaganda and preaching are not common either, because Shinto is deeply rooted in the Japanese people and traditions.
"Shinto gods" are called kami. They are sacred spirits which take the form of things and concepts important to life, such as wind, rain, mountains, trees, rivers and fertility. Humans become kami after they die and are revered by their families as ancestral kami. The kami of extraordinary people are even enshrined at some shrines. The Sun Goddess Amaterasu is considered Shinto's most important kami.
Explanation: The roaring 20s were a time where people socialized and interact with eachother. President Coolidge was known as "silent Cal" and therefore, wasn't an accurate representive of the behavior of the 1920s.