What issues you think will trigger World War 4? Why?

i dont quite agree with some of the people who responded to this thread that there hasnt been a 3rd world war. the world is progressing and we dont need to get into a physical war only for them to call it war...the cold war was one of the worst wars and i believe that is third world war..the 4th world war will definitely be triggered by religion or some countries like North Korea if they use neuclear weapons to attack other countries as they keep on threatening!!

I guess this current issue of nuclear arming, US wants to limit nations having nuclear bomb to its current number. While some country insist they should have like North Korea and Iran. This sensitive issue challenge U.S. capability to stand still as World prime power.

There hasnt even been a WW3 yet though

Not sure what will trigger WW4, or WW3 for that matter, but when we look back in history almost every major military conflict has something to do with religion. With what is going on in the world at the moment then WW3 may not be too far away.

dude i dont think there is going to be a world war in the near future atleast for our lifetime...coz now the third world is quite powerful unlike the two world wars before where the third world was not a power to reckon with... and no country is quite vulnerable now...