Judge Napolitano, well-known advocate for libertarianism explains natural law and natural rights in this video. Napolitano says, " ... we have natural rights that come from our humanity, that they don't come from the government." Some Christians hold the view that natural law was established by a Divine creator.
This argument of natural law shaped the Declaration of Independence and the United States Constitution.
Napolitano also mentions "a right to be left alone" that will surely upset advocates of big government.