Good quote. I bought that book, rare to get, I think for like $80 or maybe $100 at one time thinking I needed to get it :P Then later I found it as a PDF... doh!
Yup, natural moral law as I try to specify it at times, but I usually just say moral law ;) Causality is part of the natural moral law, but causality is also part of natural laws that are void of a moral dimension ;)