It is for many just a hypothetical worldwide military conflict, But for others it is seen as the planned war to end all wars. One theory is that the war will be for population reduction, to rid the earth of "useless eaters" as the masses are referred to by the elite. By reducing the population to the number shown on The Georgia Guidestones in the state of Georgia, the elite would have Utopia on Earth with enough humans left to serve them. This number is 500,000 people. At the time the Georgia Guidestones were erected, there probably was little thought given to Artificial Intelligence and using robots as slaves instead of humans. This is another aspect that should now be taken into consideration since technology has advanced to this degree at the present time.
Many believe that World War III is spoken about in the Book of Revelations in the Bible. The anti-christ shall rise and fool the world into believing he is the answer to the world's problems. Armageddon will be the war between good and evil, the final war on earth with 1,000 years of peace to follow.
World War III (WWIII, WW3 or the Third World War) is a hypothetical worldwide military conflict following World War II. Because of the development and use of nuclear weapons near the end of World War II and their subsequent acquisition and deployment by several countries, it is feared that a third world war could cause massive global destruction and could even cause the end of human civilization and most or all human life on Earth. A common hypothesis is that a small number of people could survive such an armageddon, possibly in deep underground blast shelters or away from Earth such as on the Moon or Mars or in space vehicles. - Source: Wikipedia