How about not deleting any country or state I’m pretty sure it would cause a lot of problems for example sea levels would probably fall because a state or country by the sea is gone and the sea would need to take up more volume then it did and that is for countries or states by the sea but if it was a country in the middle of the map or any part of the map it could also cause a change In the economy and the reason I only say a change in the economy is because if oil was unearthed then well you get the idea but also if oil was unearthed at a no longer existing country at the sea well it could cause more sea pollution and well I would list the problems but they would go on and on so I’m just gonna put there is more problems that would be caused with removing a country then you could even think of.