In Book V, Aristotle noted that some laws are common to all people, whether Persians and Greeks, Egyptians or Babylonians. All agree that murder and theft are wrong; all agree that our word is our bond and that contracts must be kept. The origin of these universal rules for conduct and justice can’t be written law, since all written law is based on them. So where did they come from? They come from our observation of nature, Aristotle said, and the experience of seeing what’s fair and what’s unfair in actual situations. From that experience, human beings extract a standard of justice that “has
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