How did the decade of the twenties change America culturally and economically?

Flappers and their general sexual freedom combined with WWI veterans coming home with some European ideas for the bedroom that had been stifled by American conservatism put women into a different position socially. Prohibition was doing its thing so vice and human nature greatly strengthened organized crime. The "Roaring Twenties" was also a time of excess until the market collapsed. (Read the Great Gatsby!) The great depression was made possible by the overconfidence in the market that was created by the immense prosperity of the "Roaring Twenties". The economic devastation that resulted from the reparations required of Germany at the time would eventually teach the US a valuable lesson about global economics.