Second most was the start of public acceptance of new inventions that affect us today. Radio went from a form of communication to a media during the 20’s — that was when radio was begun to be used for popular entertainment the same we use television today. Like the printing press radio became a method whereby ideas and cultural customs would be quickly disseminated all through the U.S. Because of radio the 20’s was known as the “fad” age. People would take up new cultural changes such as new dancing and new music (jazz — the 20s were also the jazz age). I don’t know if you covered this yet but radio along with silent movies, which were already popular caused “cultural homoginization” In other words cultures and social mores and practices went from being regional to national. The 20s saw the demise of regional cultures in the U.S.

The second was airplanes. Popularized during WWI, airlines captured the imagination of people and it was during the 1920s that scientific breakthroughs were made that saw aviation to become a means of transportation. Getting from New York to Los Angeles took a day instead of 5 days by rail.

The Highest Record of KKK Enlistment.

Movies and Entertainment.

I hope some of this helps!

there all all sorts of things that changed history during that time and he was a big impact on that era