Natural Laws are the natural boundaries of the universe.
If you have one blade of grass in one hand, and another blade of grass in the other hand, and you put them together, there will be two blades of grass. Certain people might try to change that law to suit their motives, but long after their motives and modified law are gone the simple reality of the natural law will still be there.
Natural laws are a tree you can climb.
The important thing to remember about climbing trees is that you did not plant them or tell their branches where to go. First you look at the branches, then you follow where they lead.
Plastic trees are easy to keep.
Some people are happy with a concretely articulated collection of laws. Marijuana must not be consumed, unless you are in certain countries. Likewise prostitutes should not be patronized, except in certain areas (or by U.S. Secret Service agents, who are exempt). Marriage is legitimate so long as the church or political government (depending on your area) approve. If the church or government do not approve, and do not give you official paperwork, the marriage is not "real".
Do other people's laws matter?
A person first has to understand that there are real laws in the world, natural laws.
Then a person has to understand that there is a distinct difference between real (natural) laws and artificial (political) laws.
Then a person has to protect him or her self from the latter.
Natural laws are no threat to an individual. Ignorance may be punished by death, but knowledge of natural laws, following them, is only rewarded by nature.
Artificial laws are quite a bit more complex. Their purpose is generally economic, political or social. They are written and enforced generally to benefit certain individuals at the expense of others.
A law that says "If you kill a person you will be killed" is probably the highest an artificial law can attain. It is superficially balanced and strives to imitate nature. But unfortunately it lacks any of the virtues of nature. From there, artificial laws only go downward.
If a person could only distinguish natural and artificial laws in one respect, it might be that natural laws need no words, no paper, no supporters, nothing. They exist entirely on their own. They contain a natural truth that is beyond any temporary human interest.
A person on a healthy path should respect nature and its laws while being aware of whatever artificial laws exist in their political region. "Render unto Caesar" no respect but consider him a dangerous animal that must be appeased sometimes.
All true religions are attempts to translate natural laws into a form that resonates with individuals.
Natural laws have existed for as long as time. Any individual, given sufficient awareness and time, could deduce each natural law. However, deducing, or observing, these laws takes time that is sometimes greater than that of a specific individual (meaning the individual grows old and dies before he or she is able to notice the law).
An example of a natural law is the simple concept of balance. Everything is balanced by nature. If one thing is good, something else is bad. And also, If a person gives "x", they will get "x". In religion this comes out as "Do unto others as you want them to do to you" and also "Kill by the sword, die by the sword". Of course the human tendency is to create a false nature, which they can control, to pervert the balance of nature.
All religions derive from the same natural laws. The specifics are adapted to the group, but there is no religion on earth that is derived from some other set of natural laws that are not accessible to any person. If you cannot understand a religion, you cannot blame your failure on followers of that religion. If you see another religion as evil, you are calling nature evil and you will pay a terrible price.
In nature, for at least as long as humans have existed, it has been the norm that children take the responsibilities of their parents. A parent leaves their legacy, the good and the bad, for their children.
When a child is young they are strongly protected by a concept of innocence. If a small child accidentally steps on a cat's tail and creates a stir, responsibility would usually end with "well, it's just a child". But in certain groups of very primitive people, there is a need to punish each misfortune, "appease the gods". A mistake requires either harsh punishment (if someone else does it) or evasion and rationalization (if you do it).
So, in Christianity you have the "innocent child" who takes (inherits) the responsibility ("sins") and faces mandatory death at the hands of authority (i.e., either a natural death as a consequence of inherited sin, or a judgment by a false god (i.e., a group of people).