How did the new social trends of the 1920's challenge traditional attitudes ?
The new social trends of the 1920s challenged traditional attitudes in a number of ways.
First, they challenged old attitudes about order and authority. New values, perhaps brought on by Prohibition, were more tolerant of what would once have been called misbehavior. It was more acceptable to challenge authority rather than obeying the rules.
Second, they challenged accepted ideas about the social order. Catholics and Jews were pushing for more of a place in American life. So were African Americans in Northern cities. This was a challenge to the old dominance of the white, Anglo-Saxon, Protestant elite.
Finally, they challenged accepted ideas about the appropriate roles of the sexes and of sexual morality. Women started to be more assertive about their right to go out in public and do things for fun. The “flappers” were a good example of this. They were also a good example of what was perceived to be a challenge to traditional sexual morality.
In all of these ways, the new social trends of the 1920s challenged older, more traditional attitudes.