Most people no longer live in nuclear families at all.
When I hear about something allegedly happening in the world I always ask: 'Who is doing it?' Trends break out because they're based on real demographics, like there being fewer nuclear families or more people living alone. If 10 people in Shoreditch are doing it, it's a 10-minute fad.
I don't think you necessarily have to be part of a traditional nuclear family to be a good mother.
Decomposition, for most, starts when they leave the free, social, and uncorrupted college life for the solitary confinement of professions and nuclear families.
The complete destruction of traditional marriage and the nuclear family is the 'revolutionary or utopian' goal of feminism.