[Note: this question was previously closed under the reason "needs to be more focused". I subsequently edited the question to make it more focused and then hoped it would be reopened, but no luck after weeks. I take it to be uncontrovertial that that criticism does not apply to this question in its present form, so I am reposting.]
Background: The nuclear family is an important structural part of most human societies. There are many good things about the nuclear family as a feature of society, but it is also an important source of inequality of opportunity, a value held to be important by many theorists across different positions.
My question is: is there modern work in the political philosophy literature that considers the question of whether children should be raised in nuclear families as opposed to some alternative system alternative systems like communal child-rearing or children being raised by the government.
One example I know of is Plato's Republic, but I am interested in modern work. I am also aware of some work about the internal organization of the family, but I am interested in work that engages the question of whether there should be families at all.