Is religion the most basic codification of natural law?

Thanks for remark Fraggony.
Just to add something to my previous post.
I don't know if into ancient civilisations before religion were that basic law* or invention of law was part of religion development. I think that it was rather first option.

Why?
Laws at the beginning had problem - how to find strenght to enforce law? How to force people to respect law? Union law with God demand was natural choice - in the first civilisations people were most afraid of Gods. And would do much to provide God's support. Gods are everywhere and knows everything. Thats why they believed if they broke law (which mean rising against God), they can't hide themselves anywhere.
On the other hand law supports social structure. And since the beginning of civilisation every church has best benefits into safe social structure. Thats why supporting given law supported religions too.

* By basic law or law of nature I don't mean "basics of law same or very similar for every country".
I mean something that has social function of law, don't have to be same or even similar into different countries but .... is understood as "basics of social structure organisation". - Theory of changeable law of nature. If I remember it well Petrazycki/Stammler theory.