It is easy to say how American culture changed during this decade, but it is much less easy to say why it changed. We can never be certain why cultural changes happen.
During the 1920s, American culture changed in ways that made it much more open and much less restricted. It is possible to surmise that these cultural changes came about because of economic and technological changes.
During the 1920s, American culture became much less restricted in the ways that it had traditionally been. This was especially true for women. Women no longer had to keep themselves out of the public eye as much as they once had to. They did things like smoking in public. It is said that sexual morals loosened. Clothing styles certainly did.
So why did this happen? The most logical explanation is that technological and economic changes brought this about. Women’s lives were made easier by technologies that saved them work time and gave them more leisure time. Everyone was able to have more leisure opportunities because of inventions like movies and cars. The booming economy meant that more people had extra money to spend on entertainment.
Because of these factors, we can argue, American culture changed.