One immediate factor that comes to mind is the influx of working women for wartime manufacturing. Anecdotally in California history texts I have seen it mentioned as a factor driving later feminism movements locally. As both of my grandmothers were California "riveters," I would appreciate any further reading or insight from those more familiar with the topic.

Many of the people that lived in some of the most Notorious Ghettos of late 80's Los Angeles had been home to many of the line workers for these companies and the neighborhoods became what the world remembers when they left.