Thomas Jefferson’s 1802 letter to the Danbury Baptists famously described the First Amendment as building a "wall of separation between church and State." This line has been the gold standard for those who point to the secular origins of America and the threat of funding any sort of religious activity. But this idea of America as a secular republic built on Enlightenment ideals misses a critical truth: Christianity has been at the center of American public life since European colonization began 500 years ago. The Constitution didn't create a wall between church and state—it inadvertently created a "free market" for religion that allowed Christian activists to expand their influence in unexpected ways.

Today's guest is Matthew Avery Sutton, author of Chosen Land: How Christianity Made America and Americans Remade Christianity. We see the different versions of Christianity imported during European colonization and how the absence of state control unleashed wildly eccentric religious movements that couldn't have happened in Europe. From revivalist preachers like Jonathan Edwards and Peter Cartwright to Billy Graham, and from liberal Congregationalists to twentieth-century mainline denominations, American Christianity constantly evolved.

We see this in the story of Abraham Lincoln, whose skepticism toward traditional Christianity in his twenties nearly derailed his political career. In his 1846 race against Methodist circuit rider Peter Cartwright, Lincoln faced accusations of being an infidel after openly rejecting his family's Christian faith. This episode reveals how, contrary to popular belief, America's founding generation allowed religious liberty not out of principle, but pragmatism—they needed to keep a fractious coalition together.

To understand what makes America unique, we must account for how Christianity shaped—and was shaped by—every major historical development in U.S. history. From tent revivals to megachurches, from abolition to segregation, Christianity's "free-market" evolution in America created something unlike anywhere else in the world.