What are natural rights?
“Natural rights are those that are not dependent on the laws or customs of any particular culture or government, and therefore universal and inalienable.” – Wikipedia.

What Are Legal Rights

“Legal rights are those bestowed onto a person by a given legal system (i.e., rights that can be modified, repealed, and restrained by human laws).” – Wikipedia.

What is Natural law?

“The concept of the Spirit of the Natural Law is related to the derivative concept of the Natural Rights. The spirit of the Natural law first appeared in ancient Greek philosophy and was referred to by Roman philosopher Cicero. It was subsequently alluded to in the Bible and was then developed in the Middle Ages by Catholic philosophers such as Albert the Great and his pupil Thomas Aquinas.”

The State of Nature – John Locke

John Locke reasons that in the beginning humans lived in the State of Nature. State of nature where there were no overlord State or government to impose the law of men onto their subjects. The lawbreaker was dealt with one on one, about who broke the law and how. If confronted by a lawbreaker, or catching a lawbreaker doing violence to an individual, then the lawbreaker was punished directly without a third party.
The same principle is written in the Holy Bible book of Exodus, some 3400 years ago.