Looking at the world political situation today, it has all d ingredients to start ww3.
Ww3 unlikely to be triggered from d middle east, its more likely to b triggered by the Korean war.
If america decide to fire missiles into north Korea and north Korea decides to retaliate by firing missiles into south korea, this will put d world into the brink of ww3.
If war break out bt north Korea and USA, as usual, USA will not sent troops to fight on the battle front. As usual, they will use their planes n bombers n missiles to bomb n.Korea whilst south Korea will sent troops to attack d land.
Japan will quickly enter the stage because they want to be militarily mighty again just like the olden Japan. Their hidden agenda was to conquer d whole world and so recently, in their parliament, the PM Abe hv mobilised d nation to make amendments in their constitution to allow their soldiers to fight overseas once again. They still believe that the whole world shld bow their heads to their emperor.
When north Korea is attacked, China will become v uneasy. If USA, south Korea and Japan keep attacking nth Korea, this will raise suspicion amongst the chinese govt. At this point China would b compelled to protect nth Korea because chin would not want nth Korea to b occupied by USA or its allies.
When China begin to defend nth Korea, Taiwan will jump in. When this happen, Russia will come in to support China n nth Korea.
And so ww3 begins , d rest of the world will be drag in and the world will be divided into 2 forces.