Hmm good points. Now that I think of it, I suppose the Reformation is a great example of this, especially as it impacted so many nations and really, world history.  I think there are many other more localized examples, certainly the revivals/renewals you mentioned, among others.  That said, in most of those cases the trigger was spiritual and came to impact the political. This time round I am 100% expecting a great revival but it appears to have been preceded by the political, thus far.