He gives nations power to fulfill His purposes. And He protects His people. Even though Israel was destroyed, it exists today. Because God foretold both its destruction and its restoration.
I see that you have limited your statement to since the founding of the Roman Church. I don’t know how to answer you. I don’t look at life as before Roman Church and after Roman Church. To me, the difference separating times is before Christ and after Christ. But we know that God is the same yesterday, today and forever. What He did before, He can do after. But will He? I can’t say. But if not. I will still have complete faith that the Lord dwells in truth and righteousness. That will never change.
But, then God has done that before when men, not nations, turn from God. Moses went through hell protecting the Jews from Gods’ wrath. But he spoke directly to God and God to him, so he was able to intercede for his people. God no longer talks to us in that manner. He told us what to do, how to do it and then he stepped back. Everything from that time to this, is a creation of man, governments, nations, regimes none of that is Gods work. We build it and for a time it thrives until it turns from the shared norms (in our case Judeo-Christian). Once we no longer share common norms, the nation crumbles. Half this country no longer shares Judeo-Christian norms, either we have a reformation or we are in trouble. Not in my lifetime, maybe in my children's, but certainly in their children's and grandchildren's life time. We may have just accelerate the decline however. Lots of guns, lots of ammo, lots of hate and no trust in government, not good. Biden and his Ho are not thrones to calm this situation.