“…when the older thinkers called the Law of Right and Wrong “the Law of Nature,” they really meant the Law of Human Nature. The idea was that, just as all bodies are governed by the law of gravitation and organisms by biological laws, so the creature called man also had his law—with this great difference, that a body could not choose whether it obeyed the law of gravitation or not, but a man could choose whether to obey the Law of Human Nature or to disobey it…This law was called the Law of Nature because people thought that every one knew it by nature and did not need to be taught it…And I believe they were right. If they were not, then all the things we said about the war [WWII] were nonsense. What was the sense in saying the enemy were in the wrong unless Right is a real thing which the Nazis at bottom knew as well as we did and ought to have practiced?”
What is natural law? It is the set of laws that govern human behavior. They are laws that only human beings can break by virtue of the vast difference between mankind and every other known creature. Some fundamental ways in which we are different from other beings that allow us to live natural laws are: 1) consciousness, 2) freedom of choice, 3) we see ourselves as individuals, 4) ability to analyze our thoughts and behavior, 5) capacity for self-correction.