Actually, it does answer the question. Perfectly. There will be no void, because God does not change. He is always there, in control of all things, whether we see it or not. He is Almighty King. God is sovereign over all countries and nations and puts their leaders in their place, and removes them. All according to His good and perfect will, and in his timing. There will be no “void”.
Those who belong to the Lord Jesus are not citizens of this or any country anyway. Our citizenship is in heaven.
I don’t know. Think back in history about how many lives were lost because of religious differences, and it continues today. If He is in control of all things, looking around at the World right now, one has to wonder what His master plan is, because it seems a mess right now.