No, I am not being 'tongue in cheek.'
For an introduction into the dependence on Natural Law theories as to our political origins, see Declaration Of Independence With Study Guide.
Of course, if one truly rejects Natural Law, they not only disqualify themselves from intelligent participation in our political institutions; they render themselves unable to deal with the disciplines of chemistry, physics, biology, botany, etc., etc..
Come to think of it, didn't some humanists, who believed that man could reinvent reality, once try to build a tower to heaven?
William Flax
Oh, I sincerely doubt that.