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As people of the Enlightenment, I would submit that this was less important to the Founders than liberty. They were well-aware of the blood that ran in the streets and battlefields of Europe secondary to the Reformation and Counter-Reformation (some of their ancestors left Europe because of this). They did not want those religious wars here and that is one reason why we have no state church and why they kept religion—though not God the Creator—out of our founding documents.