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Because I am a Muslim, so I use Islamic law. With Islamic law, make my life safe and calm.
if you think the best natural law, then use the law of nature.
Thanks for your asking.
Have a good day @earthcustodians

what I mean is that there Cosmic Laws that exist and that humans didnt created, and the problems in the world are essentially caused by the ignorance of these cosmic laws.

we find these cosmic laws in all religions but written in metaphors, that is why people do not see how important they are

I do not know about cosmic law.
What is cosmic law?

too long to explain one posting but here it is.... all the Cosmic Principles are proven by science. http://www.earthcustodians.net/blog/2017/10/16/the-mind-and-quest-for-truth-the-7-immutable-principles/

For me the most important law is; Do no harm.

Or more specific; Do not harm someone that has done no harm.
Self Defense, or the defense of others who are attacked by an aggressor is of course O.k.

This may explain it.