....... sexual morality tends to be cyclic. The Georgian and Regency era were a lot more permissive than the Victorian era that followed.[/QUOTE]
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The key word is: cyclic.
Women's' participation n the work force is cyclic.
As explained by my 70-something year old aunt women's' involvement in the work force ebbs and flows in waves that are too long for individuals to understand.
My aunt was born in Canada - during the Great Depression - when 1/3 of men rode the rails in search of work. Her father and uncles worked on harvest crews that followed ripening crops across the Prairies. Since men were under-employed, few women could find work outside the home. Remember that before electrification, housewives often worked 10 or 12 hours per day: cooking, cleaning, washing cloths, tending children, tending a garden, tending chickens, etc.
Come the Industrial Revolution, many lower class women worked long hours in factories, but the goal of every man was to earn a high enough wage that "my wife does not have to work outside the home."
Come the start of World War 2, most of the young men joined the army to fight overseas, stripping factories of workers, so hundreds of thousands of women worked on the floors of Canadian factories.
Immediately after the war, women were tired of factory work and wanted to settle down, raise families, etc.
Women leaving factories was also beneficial for returning veterans, many of whom were shell-shocked (battle fatigue, Post Traumatic Stress Disorder, Occupational Stress, etc.) and people believed that the best cure was hard work, a loving wife and raising children. This attitude produced the Baby Boom (1946 - 1964).
Come the 1960s, with women's' liberation, effective birth control, the sexual revolution, peace nicks, hippies, etc. many young women were reluctant to settle down in traditional families.
Come the 1970s recession (sparked by the 1973 Oil Crisis) more and more women were forced to work (outside the home) to maintain their (affluent) 1960s life style.
Given population surpluses in the late 20th century, fewer and fewer women felt pressured to live in traditional nuclear families and lesbians, etc. were allowed to publically declare their sexuality.
That was a quick time-based review of the cycles of womens' liberation, but other studies should include class distinctions, racial distinctions and regional distinctions.