I sometimes long for the 1940s and 50s, when women wore beautiful, full skirts and dresses to do simple tasks like cleaning the kitchen. What happened? Why have we gradually resorted to wearing sweatpants and shirts when cleaning? I'm not criticizing those who do, because I'm sure that's more convenient in the long run, but I'm just curious as to why people have changed so drastically in the course of 50 years.
Well, since I'm both a history and fashion geek, this is my type of question to answer (even if it was rhetorical...)
Women's Lib came along in the sixites and really pushed for equality of women and men in every way, shape, and form- and part of that was getting rid of the distinction was abolishing the notion that women needed to "dress up for their men."
Interestingly enough, the Vietnam War also sprang up around this time. The youth latched on to radical ideas and really anything that went against their traditional, "capitalism is the only way!" parents.
Pants functioned insanely well for both of these movements- you can get work done without worrying about showing your who-ha in slacks for the women's libbers, and the hippies could look really casual and show everyone how little they cared in a pair of jeans which, since the age of James Dean, had been the choice pants of badasses everywhere since the '50's. Bear in mind that, up until the mid to late sixties, nice fitting jeans were only worn on the weekends with button up shirts and ribbons for girls and cardigans and sneakers for guys (or, of course, all the time and with leather jackets for those greasers!).
I, for one, highly doubt that the world will ever return to the fifties "dress up for your day" attitude- I'm still bitter that I have to dress "business casual" for my job, meaning no jeans!