Karl Marx's critics may fixate on things he got wrong (what social scientist worth their salt doesn't over his career?); but he got a whole lot right about how capitalism would evolve over time.
This line in the Communist Manifesto struck me as foreseeing the rise of single parent households:
On what foundation is the present family, the bourgeois family, based? On capital, on private gain. In its completely developed form, this family exists only among the bourgeoisie. But this state of things finds its complement in the practical absence of the family among proletarians, and in public prostitution.
Or am I misreading him here?