What Does Subjectivism Have to Do With Positive Law?

I was asked previously about child support. Is it a good idea? And I said, yes, because the male contributed to a foreseeable consequences. So I don't think that he should be responsible for what she chooses to do without him. Since there's a whole field of philosophy of law, what does objectivism have to say about positive law other than the principle that it should be objective? Bad. There's the occasional good one in at least in series. The culture of the 50s and 60s when I grew up was much better until about 1964. But movies went on, there were great movies in the later 60s.