(e.g., expanding into a multi-page research paper)
Technological and economic shifts provided the infrastructure for this new era. The rise of the automobile granted youth newfound mobility and privacy, while the mass production of the radio and phonograph brought jazz from urban clubs into living rooms across the country. This period also saw the "New Woman" emerge; the flapper, with her bobbed hair and shorter hemlines, challenged traditional gender roles by voting, smoking, and dancing in public. This social liberation was paradoxically intensified by Prohibition. The 18th Amendment, which banned alcohol, gave rise to speakeasies—underground clubs where men and women of different social classes, and sometimes different races, mingled over illegal cocktails. Jazz.Age.rar
If you'd like to refine this into a specific academic argument: which banned alcohol