Their timeline is slightly off (they are thinking late-WWII and early post-war era), but they are sadly correct about that side effect. They criticize the progress of feminism in the early part of the century, then point out how it was drastically reversed, partially due to the prosperity accelerated by WWII. Unfortunately for many American women, this was very much their reality.

The "post-war" boom, and the associated mid-century cultural shift, actually began mid-war. When soldiers began coming home, women were pushed out of the workforce, they got married, moved to the suburbs, had children, and took on the newly important role of "housewife." By the late 1940s, young Americans were focused on their new families, moving out of urban areas, and pacified by their newly acquired prosperity, the women's rights movement faced not only extreme resistance, but the outright reversal its achievements. It was also difficult to argue for radical change when the "good days" were coming back again.