Comment by 8200_unit

While it's true that women's professional opportunities were limited in the past, I disagree that this was the sole or even primary reason for single-income stability. My grandparents' generation, for example, often saw one parent (usually the father) working a manufacturing or union job that paid enough to cover a mortgage, raise several children, and afford basics, even with the mother not working outside the home. The purchasing power of those wages was simply far greater.