Earlier quoted context omitted.
There's no real reason/mechanism for the exclusions to have made anything work better. Compared to the US being the Arsenal of Democracy, the economic effect of liberalization was very small, ignoring long-term government debt. The New Left in the 1960s mostly just failed outright. Any change then was due to judicial or executive action.
Partially devil's advocate: Women not working en masse means single-income households as a norm, which means all the real economic value of someone staying at home to take care of home issues and a general supply-and-demand situation where workers needed to be paid enough to make things work on a single income. Flood the market with twice as many workers, wages go down and the expectation becomes two-incomes, and thu…
Some of this is hedonic in nature; if you watch "Fargo" second season, you see in pretty good detail how people lived 35 years ago. I'm pretty sure this would be considered something much more like poverty now. Of course, I'd be ignoring any inflation in price of the homes shown, by design.