Every so often in American history, we have a "girl power" movement. One appears to be happening right now, as we speak. That is, today's girls are graduating from college in greater numbers than boys, and getting better entry-level jobs. This appears to have no precedent in American or world history.
This "girl power" movement is an offshoot of their MOTHERS of the Baby Boom generation, which fought EQUAL rights for women; access to a good education and high level jobs, including, in the case of Hillary Clinton, the chance to run for President of the United States.
Likewise, the Flappers was a "girl power" movement FOR ITS TIME. That is, fighting for the right for girls to wear "less restrictive" clothing, and otherwise act more like men. This, in turn, had been fueled by THEIR mothers of FDR's "Rendezvous With Destiny" generation, who fought for, and got the right of women to VOTE, under the 19th Amendment.
To address a comment below, the post-2000 "girl" (and Hillary) power movements were the result of "Women's Lib" in the 1960s, and likewise, the Flapper Movement of the 1920s was incubated by the women's rights movement of the 1890s, 30 years earlier. The commenter also reasonably wondered why the 1861-1882 generation is associated with FDR (born 1882) and not TR (born 1858). (Like Obama with the Boomers, FDR was born at the end of "his" generation.) The reason is that it was FDR, and not TR, who said, "This generation has rendezvous with destiny."