https://www.washingtonpost.com/news...ers-and-poverty-is-not-as-simple-as-it-seems/
http://scholar.harvard.edu/files/hendren/files/trends_in_intergenerational_mobility_pdf.pdf
If you care to read the article it does a good job of showing exactly how generational poverty/mobility have an interconnected relationship beyond the traditional "welfare broke up the black family, single mothers, etc.)
The massive loss in wealth, as well as options to build wealth for AAs, is directly tied to the capital/labor ratio - and not single parenthood. Yes, household income for AAs is going to be lower when there is only one parent in the household, but poorer people marry at a lower rate - and with the break-up of unions, the massive manufacturing shift overseas, the increase in mass incarceration and the cutting of funding for community resources, public education, and grant programs that allow mobility - the problem is purely economic.
And "economic" in this case is also tied to more than just the literal job one has, but the connected culture it fosters, which is why the communities where Black single parenthood is at its highest, are also the areas where class mobility is the lowest. I.e. Black men and Black women are stuck without many options to move up.
Shaming for OOW children was not the reason why it was lower in the past, and the increase in single parenthood in White communities without the decrease in White wealth is a showing of how little the two are related.
This is all to say: single parenthood is a symptom of a massive race and class issue here in the US - it is not the cause.