The "nuclear family" is a capitalist invention. There is nothing either inherently "natural" or "good" about it. For centuries, people lived in close-knit family groups and had their financial and emotional needs tended to. Do you ever wonder why so many immigrant communities, who live in extended-family groups, have so much more economic and educational success than do other groups? They know that the "nuclear family" is a fiction. I don't have to agree with BLM in everything, but they are definitely correct on the nuclear family issue. Do a little homework on the issue and see what you discover.