Very interesting question regarding the third world war. The fact is that if you look at all the military conflicts that are happening now and then Who is involved in them, clearly one can come to the conclusion that all these wars will not end so quickly yet. If you pay attention to Syria and even to North Korea, you can definitely say which countries will be the culprits of the 3rd World War
North Korea is not going to attack anyone. Their's is just empty talk. Let's focus our attention on Syria. It is true that most of the world powers are involved in Syria. But their involvement is limited to air-strikes and training. So the Syrian conflict also is not going to escalate in to a world war.
This is incorrect. Syria is already a world war. The price of oil is low and likely to decline further. Russia is not interested in a stable situation in Syria. This can significantly reduce the volume of sales of Russian hydrocarbons to Europe. So they will do everything so that the world did not come in Syria.