Here is a passage which relates to American Creation's mission:
The article describes Lewis as an "evangelical." Arguably, that errs. Lewis was an orthodox Anglican. Indeed he famously articulated the notion of "mere Christianity" that united Protestants, Roman Catholics, Anglicans and capital O Orthodox Christians along a common ground of Nicene orthodoxy. If you didn't believe in Nicene Trinitarianism, you were not a "mere Christian," whatever you may have called yourself. That means among others, Mormons, Jehovah's Witnesses, Thomas Jefferson, John Adams, probably George Washington, James Madison, John Locke, Isaac Newton and even John Milton himself were not "Christians" even though they all in some sense considered themselves to be.