is it possible only one country left on the earth?

Do you think that only one country would be destroyed in the world? It is humankind would be destroyed if the weapons are keep on increasing. Humanity is dying within people's mind. If it continues the whole Earth will be destroyed.

Well, there are a lot of conflicts, so for us to be united as a "country" we must kill at least 95% of the world's population. If we do that, there wouldn't be enough people to be considered a "country".

well, I don't know if it is possible or not, but I really hope that will never happen. we know that some countries are still in conflict, but still we can see many countries live peacefully side by side with all the differences they have. let's hope those countries with conflicts could find their way to live in peace, and to the dangerous and powerful weapons they've made, hopefully will never be needed anymore.

I think some civilizations die out someday, maybe it will take hundreds of years though, but i think it is impossible for only one to really come out on top, since some countries are very competitive.

Why not , is every one like to be a powerful , then it is possible . If all nations try to live like a family then it is very noce for all .