“Obviously we can’t say this is all causal—in general all good properties are correlated, so it’s likely there are shared genetic etc. causes.”
Through infanticide, males can eliminate the offspring of their competition and get the female back to full baby-making capacity faster
There are non-political ways to address this, such as better contraceptives like Vasalgel.
EA already has semi-official positions on intractable political issues like immigration. If stable two-parent families are indeed an effective way to prevent child abuse, I don’t see why we shouldn’t have a semi-official position on promoting those as well. It could help address conservative underrepresentation in the EA movement. I think if some positions are taken publicly on both sides, that increases our credibility as an independent source of truth. Otherwise we might be seen as “EA-washing” the political positions that we already held as coastal liberal types.
But really I think stable two-parent families are a bipartisan issue. For example, abortion probably helps reduce the incidence of single motherhood (though of course the ethics of abortion itself is another can of worms). I don’t think your average liberal person is actually against fatherhood or stable households, they just prioritize other outcome measures (perhaps incorrectly if the data here is right).