laskern,
“As a historical note the discontinuation of wearing hats came with the arrival of President Kennedy. Cristziansich Yudensich. We follow the umas haolom.”
I doubt that. I’m not a sociologist, but if I were to guess, I think the rise of the automobile as a primary mode of transportation, especially once they became climate controlled, is what led to hats falling into disuse. The ability to travel or commute in a dry cabin with comfortable temperatures reduced the need for the hat’s functionality, and the low ceiling and lack of space made hats inconvenient to bring along in the car.