there is a lot of dependance on other nations, the greed for money and materials may make things tense but they would have to be stupid to jeopardize business, plus globalisation has made them unable to be self sufficient as easily. i think world war in the sense that people have known before will not happen again, leaders do not rule their people any more, there is not even a need for weaponry to bring an evil to its knees, and if any war it will be made alone and systematically shunned from the rest of the world.
Definitely yes. If it's not already there. I mean.... every politican fears to use this word and they won't tell us wether or not there is one either. Everyone has to decide on his own when a war is a World War.
For example, many countries are directly or supportively already involved in the conflicts in the near east. The war takes place not only in one country, but in several. Many people of different cultures suffer from this war. What is a World War, if not this?