It's coming! Be ready for it! If history teaches you one thing, it's there is always a next great war. Would you rather be to idiot that was ready for something that never came or the one that wasn't ready for anything to come? Think about it. TSFG
WW3 is very unlikely event: to provide the war needs to've stable basic ground (own land) with full-scaled infrastructure + natural resources to run manufactures /R&D's. de-facto Mother - Nature has stricken each corner of the World in very severe manner that makes industrial objects as ticking bombs. but revolutions are most likeliest reality because chaos always has been fertile soil to fuel destructive emotions.
Big war? Yep, absolutely. I'm thinking somewhere in either Southeast Asia concerning the Koreas or China and Taiwan or in Southwest Asia related to Iran. Pakistan and India have to potential to turn up the heat, figuratively and literally. The world does not seem that stable to me, especially when in economic turmoil.
World War III = Cold War
World War IV = War on Terror (combines the Gulf War of 1990-1, interwar period 1991-2003, and Second Gulf War of 2003-2010, Operation Atalanta, War in Afghanistan 2001–present, etc. etc.; and is still going on)
When we (The US) pull out completely from Iraq at the end of this year that will no doubt embolden Iran; we will have to wait and see what a radical religious regime (though not the populace) will elect to do to increase their influence in the AOR…