Interesting subject. Here are a couple of passages that seem to support what you're saying:
And it shall be for a sign and for a witness unto the LORD of hosts in the land of Egypt: for they shall cry unto the LORD because of the oppressors, and he shall send them a saviour, and a great one, and he shall deliver them. 21 And the LORD shall be known to Egypt, and the Egyptians shall know the LORD in that day, and shall do sacrifice and oblation; yea, they shall vow a vow unto the LORD, and perform it. 22 And the LORD shall smite Egypt: he shall smite and heal it: and they shall return even to the LORD, and he shall be intreated of them, and shall heal them. Isaiah 19:20-22 (KJV)
So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them. 6 For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes. 7 And he caused it to be proclaimed and published through Nineveh by the decree of the king and his nobles, saying, Let neither man nor beast, herd nor flock, taste any thing: let them not feed, nor drink water: 8 But let man and beast be covered with sackcloth, and cry mightily unto God: yea, let them turn every one from his evil way, and from the violence that is in their hands. 9 Who can tell if God will turn and repent, and turn away from his fierce anger, that we perish not? 10 And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did it not. Jonah 3:5-10 (KJV)
I'm not sure what you mean by "Christian nations" though. I think "state churches" are wrong, but a nation can repent and turn to the Lord apart from having one.
And it shall be for a sign and for a witness unto the LORD of hosts in the land of Egypt: for they shall cry unto the LORD because of the oppressors, and he shall send them a saviour, and a great one, and he shall deliver them. 21 And the LORD shall be known to Egypt, and the Egyptians shall know the LORD in that day, and shall do sacrifice and oblation; yea, they shall vow a vow unto the LORD, and perform it. 22 And the LORD shall smite Egypt: he shall smite and heal it: and they shall return even to the LORD, and he shall be intreated of them, and shall heal them. Isaiah 19:20-22 (KJV)
So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them. 6 For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes. 7 And he caused it to be proclaimed and published through Nineveh by the decree of the king and his nobles, saying, Let neither man nor beast, herd nor flock, taste any thing: let them not feed, nor drink water: 8 But let man and beast be covered with sackcloth, and cry mightily unto God: yea, let them turn every one from his evil way, and from the violence that is in their hands. 9 Who can tell if God will turn and repent, and turn away from his fierce anger, that we perish not? 10 And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did it not. Jonah 3:5-10 (KJV)
I'm not sure what you mean by "Christian nations" though. I think "state churches" are wrong, but a nation can repent and turn to the Lord apart from having one.
Earlier in history, it was just assumed that a king had alliances with a particular group within the nation to coerce the entire country to observe his philosophy of law. But as nations grew and progressed, it became necessary for larger portions of the populace to support the government in order for it to remain for any length of time.
But thanks very much for the biblical references. I plan to use them!