Henry Kissinger held the peace of Westphalia was the political. It established the sovereign states of Europe. But from the point of view of the people at the time it was religious. Protestant versus Catholic. The Enlightenment thought as political [as the idea of getting rid of kings and priests and putting intellectuals in charge.] did not play a role as far as I can see.
The modern world with limited [or no] monarchs, and little role for religion from what I can see is a result of the English Glorious Revolution.

[Not that I think to go back to the way things were.]

From my point of view I think that one of the great benefits of trust in God is you stop worrying about politics or thinking you or "the people" control it.