Fredo said:...my research...indicates that men's hats such as the Fedora began declining as a result of WWII...
My 80-year old father and I were watching the Olympic closing ceremonies and he spots the flat, driving-style/newsboy caps worn by the athletes.
Dad: "We use to call those things depression caps."
Me: "What do you mean?"
Dad: "That's what men wore because they couldn't afford a decent hat."
Dad was a teen during the depression, wore a garrison cap in the Army just after WWII, and rarely wears a hat today. Even my youngest son wears a brimmed hat more than his grandfather does.
Bill