If the poles have already melted due to emmissions, is it very likely that the earth will die in nuclear war?

If the poles have already melted due to gas emissions, is it very likely that the earth will die in nuclear war? I mean who are the idiots and who are worthy of being called advanced cultures those that create technological and materialistic advances or those that live by instinct and simpler ways? I think these ways have met their match and God's punishment will be the only politics left for our stupid ways.